Google Chat API . spaces . messages

Instance Methods

attachments()

Returns the attachments Resource.

reactions()

Returns the reactions Resource.

close()

Close httplib2 connections.

create(parent, body=None, messageId=None, messageReplyOption=None, requestId=None, threadKey=None, x__xgafv=None)

Creates a message in a Google Chat space. For an example, see [Create a message](https://developers.google.com/chat/api/guides/v1/messages/create). Calling this method requires [authentication](https://developers.google.com/chat/api/guides/auth) and supports the following authentication types: - For text messages, user authentication or app authentication are supported. - For card messages, only app authentication is supported. (Only Chat apps can create card messages.)

delete(name, force=None, x__xgafv=None)

Deletes a message. For an example, see [Delete a message](https://developers.google.com/chat/api/guides/v1/messages/delete). Requires [authentication](https://developers.google.com/chat/api/guides/auth). Fully supports [service account authentication](https://developers.google.com/chat/api/guides/auth/service-accounts) and [user authentication](https://developers.google.com/chat/api/guides/auth/users). [User authentication](https://developers.google.com/chat/api/guides/auth/users). Requests authenticated with service accounts can only delete messages created by the calling Chat app.

get(name, x__xgafv=None)

Returns details about a message. For an example, see [Read a message](https://developers.google.com/chat/api/guides/v1/messages/get). Requires [authentication](https://developers.google.com/chat/api/guides/auth). Fully supports [service account authentication](https://developers.google.com/chat/api/guides/auth/service-accounts) and [user authentication](https://developers.google.com/chat/api/guides/auth/users). [User authentication](https://developers.google.com/chat/api/guides/auth/users). Note: Might return a message from a blocked member or space.

list(parent, filter=None, orderBy=None, pageSize=None, pageToken=None, showDeleted=None, x__xgafv=None)

Lists messages in a space that the caller is a member of, including messages from blocked members and spaces. For an example, see [List messages](/chat/api/guides/v1/messages/list). Requires [user authentication](https://developers.google.com/chat/api/guides/auth/users).

list_next()

Retrieves the next page of results.

patch(name, allowMissing=None, body=None, updateMask=None, x__xgafv=None)

Updates a message. There's a difference between the `patch` and `update` methods. The `patch` method uses a `patch` request while the `update` method uses a `put` request. We recommend using the `patch` method. For an example, see [Update a message](https://developers.google.com/chat/api/guides/v1/messages/update). Requires [authentication](https://developers.google.com/chat/api/guides/auth). Fully supports [service account authentication](https://developers.google.com/chat/api/guides/auth/service-accounts) and [user authentication](https://developers.google.com/chat/api/guides/auth/users). [User authentication](https://developers.google.com/chat/api/guides/auth/users). Requests authenticated with service accounts can only update messages created by the calling Chat app.

update(name, allowMissing=None, body=None, updateMask=None, x__xgafv=None)

Updates a message. There's a difference between the `patch` and `update` methods. The `patch` method uses a `patch` request while the `update` method uses a `put` request. We recommend using the `patch` method. For an example, see [Update a message](https://developers.google.com/chat/api/guides/v1/messages/update). Requires [authentication](https://developers.google.com/chat/api/guides/auth). Fully supports [service account authentication](https://developers.google.com/chat/api/guides/auth/service-accounts) and [user authentication](https://developers.google.com/chat/api/guides/auth/users). [User authentication](https://developers.google.com/chat/api/guides/auth/users). Requests authenticated with service accounts can only update messages created by the calling Chat app.

Method Details

close()
Close httplib2 connections.
create(parent, body=None, messageId=None, messageReplyOption=None, requestId=None, threadKey=None, x__xgafv=None)
Creates a message in a Google Chat space. For an example, see [Create a message](https://developers.google.com/chat/api/guides/v1/messages/create). Calling this method requires [authentication](https://developers.google.com/chat/api/guides/auth) and supports the following authentication types: - For text messages, user authentication or app authentication are supported. - For card messages, only app authentication is supported. (Only Chat apps can create card messages.)

Args:
  parent: string, Required. The resource name of the space in which to create a message. Format: `spaces/{space}` (required)
  body: object, The request body.
    The object takes the form of:

{ # A message in a Google Chat space.
  "actionResponse": { # Parameters that a Chat app can use to configure how its response is posted. # Input only. Parameters that a Chat app can use to configure how its response is posted.
    "dialogAction": { # Contains a [dialog](https://developers.google.com/chat/how-tos/dialogs) and request status code. # Input only. A response to an event related to a [dialog](https://developers.google.com/chat/how-tos/dialogs). Must be accompanied by `ResponseType.Dialog`.
      "actionStatus": { # Represents the status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). # Input only. Status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). Displays a status and message to users, if necessary. For example, in case of an error or success.
        "statusCode": "A String", # The status code.
        "userFacingMessage": "A String", # The message to send users about the status of their request. If unset, a generic message based on the `status_code` is sent.
      },
      "dialog": { # Wrapper around the card body of the dialog. # Input only. [Dialog](https://developers.google.com/chat/how-tos/dialogs) for the request.
        "body": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # Input only. Body of the dialog, which is rendered in a modal. Google Chat apps don't support the following card entities: `DateTimePicker`, `OnChangeAction`.
          "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
            { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
              "actionLabel": "A String", # The label that displays as the action menu item.
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
            },
          ],
          "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
          "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
            "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
            "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
          },
          "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
          "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "sectionDividerStyle": "A String", # The divider style between sections.
          "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
            { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
              "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
              "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
              "widgets": [ # All the widgets in the section. Must contain at least one widget.
                { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                  "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                    "buttons": [ # An array of buttons.
                      { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                        "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                        "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                          "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                          "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                          "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                          "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                        },
                        "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                        "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                          "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                          "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                          "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                          "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                        },
                        "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                          "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                            "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                            "openAs": "A String", # How to open a link. Not supported by Chat apps.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "text": "A String", # The text displayed inside the button.
                      },
                    ],
                  },
                  "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                    "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                      { # A column.
                        "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                        "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                        "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                        "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                          { # The supported widgets that you can include in a column.
                            "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                              "buttons": [ # An array of buttons.
                                { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                  "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                  "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                    "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                    "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                    "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                    "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                  },
                                  "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                  },
                                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                      "url": "A String", # The URL to open.
                                    },
                                  },
                                  "text": "A String", # The text displayed inside the button.
                                },
                              ],
                            },
                            "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                              "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                              "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                              "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                              "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                            },
                            "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                              "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                              "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                              "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                                "controlType": "A String", # How the switch appears in the user interface.
                                "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "selected": True or False, # When `true`, the switch is selected.
                                "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                              "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                              "topLabel": "A String", # The text that appears above `text`. Always truncates.
                              "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                            },
                            "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                              "altText": "A String", # The alternative text of this image that's used for accessibility.
                              "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                            },
                            "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                              "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                                { # An item that users can select in a selection input, such as a checkbox or switch.
                                  "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                  "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "text": "A String", # The text that identifies or describes the item to users.
                                  "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                },
                              ],
                              "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                              "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                              "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                              "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                                "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                                "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                      "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                    },
                                  },
                                },
                              },
                              "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                            },
                            "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                              "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                              "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                                "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                  { # One suggested value that users can enter in a text input field.
                                    "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                  },
                                ],
                              },
                              "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                              "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                              "text": "A String", # The text that's shown in the widget.
                            },
                          },
                        ],
                      },
                    ],
                  },
                  "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                    "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                    "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                    "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                    "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                  },
                  "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                    "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                    "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                    "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                      "controlType": "A String", # How the switch appears in the user interface.
                      "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "selected": True or False, # When `true`, the switch is selected.
                      "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                    "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                    "topLabel": "A String", # The text that appears above `text`. Always truncates.
                    "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                  },
                  "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                  },
                  "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                    "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                      "cornerRadius": 42, # The corner radius for the border.
                      "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "type": "A String", # The border type.
                    },
                    "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                    "items": [ # The items to display in the grid.
                      { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                        "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                        "image": { # Represents an image. # The image that displays in the grid item.
                          "altText": "A String", # The accessibility label for the image.
                          "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                            "cornerRadius": 42, # The corner radius for the border.
                            "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                            },
                            "type": "A String", # The border type.
                          },
                          "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                            "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                            "type": "A String", # The crop type.
                          },
                          "imageUri": "A String", # The image URL.
                        },
                        "layout": "A String", # The layout to use for the grid item.
                        "subtitle": "A String", # The grid item's subtitle.
                        "title": "A String", # The grid item's title.
                      },
                    ],
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "title": "A String", # The text that displays in the grid header.
                  },
                  "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                  "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                    "altText": "A String", # The alternative text of this image that's used for accessibility.
                    "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                    "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                      { # An item that users can select in a selection input, such as a checkbox or switch.
                        "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                        "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                        "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                        "text": "A String", # The text that identifies or describes the item to users.
                        "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      },
                    ],
                    "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                    "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                    "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                    "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                      "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                      "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                        "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                          "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                            "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                          },
                        },
                      },
                    },
                    "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                  },
                  "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                    "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                    "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                      "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                        { # One suggested value that users can enter in a text input field.
                          "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                        },
                      ],
                    },
                    "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                    "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                    "text": "A String", # The text that's shown in the widget.
                  },
                },
              ],
            },
          ],
        },
      },
    },
    "type": "A String", # Input only. The type of Chat app response.
    "url": "A String", # Input only. URL for users to authenticate or configure. (Only for `REQUEST_CONFIG` response types.)
  },
  "annotations": [ # Output only. Annotations associated with the `text` in this message.
    { # Output only. Annotations associated with the plain-text body of the message. To add basic formatting to a text message, see [Format text messages](https://developers.google.com/chat/api/guides/message-formats/text#format-texts). Example plain-text message body: ``` Hello @FooBot how are you!" ``` The corresponding annotations metadata: ``` "annotations":[{ "type":"USER_MENTION", "startIndex":6, "length":7, "userMention": { "user": { "name":"users/{user}", "displayName":"FooBot", "avatarUrl":"https://goo.gl/aeDtrS", "type":"BOT" }, "type":"MENTION" } }] ```
      "length": 42, # Length of the substring in the plain-text message body this annotation corresponds to.
      "slashCommand": { # Annotation metadata for slash commands (/). # The metadata for a slash command.
        "bot": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The Chat app whose command was invoked.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
        "commandId": "A String", # The command ID of the invoked slash command.
        "commandName": "A String", # The name of the invoked slash command.
        "triggersDialog": True or False, # Indicates whether the slash command is for a dialog.
        "type": "A String", # The type of slash command.
      },
      "startIndex": 42, # Start index (0-based, inclusive) in the plain-text message body this annotation corresponds to.
      "type": "A String", # The type of this annotation.
      "userMention": { # Annotation metadata for user mentions (@). # The metadata of user mention.
        "type": "A String", # The type of user mention.
        "user": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The user mentioned.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
      },
    },
  ],
  "argumentText": "A String", # Output only. Plain-text body of the message with all Chat app mentions stripped out.
  "attachedGifs": [ # Output only. GIF images that are attached to the message.
    { # A GIF image that's specified by a URL.
      "uri": "A String", # Output only. The URL that hosts the GIF image.
    },
  ],
  "attachment": [ # User-uploaded attachment.
    { # An attachment in Google Chat.
      "attachmentDataRef": { # A reference to the attachment data. This field is used with the media API to download the attachment data.
        "attachmentUploadToken": "A String", # Opaque token containing a reference to an uploaded attachment. Treated by clients as an opaque string and used to create or update Chat messages with attachments.
        "resourceName": "A String", # The resource name of the attachment data. This field is used with the media API to download the attachment data.
      },
      "contentName": "A String", # Output only. The original file name for the content, not the full path.
      "contentType": "A String", # Output only. The content type (MIME type) of the file.
      "downloadUri": "A String", # Output only. The download URL which should be used to allow a human user to download the attachment. Chat apps shouldn't use this URL to download attachment content.
      "driveDataRef": { # A reference to the data of a drive attachment. # Output only. A reference to the Google Drive attachment. This field is used with the Google Drive API.
        "driveFileId": "A String", # The ID for the drive file. Use with the Drive API.
      },
      "name": "A String", # Resource name of the attachment, in the form `spaces/*/messages/*/attachments/*`.
      "source": "A String", # Output only. The source of the attachment.
      "thumbnailUri": "A String", # Output only. The thumbnail URL which should be used to preview the attachment to a human user. Chat apps shouldn't use this URL to download attachment content.
    },
  ],
  "cards": [ # Deprecated: Use `cards_v2` instead. Rich, formatted, and interactive cards that you can use to display UI elements such as: formatted texts, buttons, and clickable images. Cards are normally displayed below the plain-text body of the message. `cards` and `cards_v2` can have a maximum size of 32 KB.
    { # A card is a UI element that can contain UI widgets such as text and images.
      "cardActions": [ # The actions of this card.
        { # A card action is the action associated with the card. For an invoice card, a typical action would be: delete invoice, email invoice or open the invoice in browser. Not supported by Google Chat apps.
          "actionLabel": "A String", # The label used to be displayed in the action menu item.
          "onClick": { # An `onclick` action (for example, open a link). # The onclick action for this action item.
            "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
              "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
              "parameters": [ # List of action parameters.
                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                  "key": "A String", # The name of the parameter for the action script.
                  "value": "A String", # The value of the parameter.
                },
              ],
            },
            "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
              "url": "A String", # The URL to open.
            },
          },
        },
      ],
      "header": { # The header of the card. A header usually contains a title and an image.
        "imageStyle": "A String", # The image's type (for example, square border or circular border).
        "imageUrl": "A String", # The URL of the image in the card header.
        "subtitle": "A String", # The subtitle of the card header.
        "title": "A String", # The title must be specified. The header has a fixed height: if both a title and subtitle is specified, each takes up one line. If only the title is specified, it takes up both lines.
      },
      "name": "A String", # Name of the card.
      "sections": [ # Sections are separated by a line divider.
        { # A section contains a collection of widgets that are rendered (vertically) in the order that they are specified. Across all platforms, cards have a narrow fixed width, so there's currently no need for layout properties (for example, float).
          "header": "A String", # The header of the section. Formatted text is supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
          "widgets": [ # A section must contain at least one widget.
            { # A widget is a UI element that presents text and images.
              "buttons": [ # A list of buttons. Buttons is also `oneof data` and only one of these fields should be set.
                { # A button. Can be a text button or an image button.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
              ],
              "image": { # An image that's specified by a URL and can have an `onclick` action. # Display an image in this widget.
                "aspectRatio": 3.14, # The aspect ratio of this image (width and height). This field lets you reserve the right height for the image while waiting for it to load. It's not meant to override the built-in aspect ratio of the image. If unset, the server fills it by prefetching the image.
                "imageUrl": "A String", # The URL of the image.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
              },
              "keyValue": { # A UI element contains a key (label) and a value (content). This element can also contain some actions such as `onclick` button. # Display a key value item in this widget.
                "bottomLabel": "A String", # The text of the bottom label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "button": { # A button. Can be a text button or an image button. # A button that can be clicked to trigger an action.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
                "content": "A String", # The text of the content. Formatted text supported and always required. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "contentMultiline": True or False, # If the content should be multiline.
                "icon": "A String", # An enum value that's replaced by the Chat API with the corresponding icon image.
                "iconUrl": "A String", # The icon specified by a URL.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action. Only the top label, bottom label, and content region are clickable.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
                "topLabel": "A String", # The text of the top label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              },
              "textParagraph": { # A paragraph of text. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Display a text paragraph in this widget.
                "text": "A String",
              },
            },
          ],
        },
      ],
    },
  ],
  "cardsV2": [ # An array of [cards](https://developers.google.com/chat/api/reference/rest/v1/cards). Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the messages can't contain cards. To learn about cards and how to create them, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui).
    { # A [card](https://developers.google.com/chat/api/reference/rest/v1/cards) in a Google Chat message. Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the message can't contain cards.
      "card": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # A card. Maximum size is 32 KB.
        "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
          { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
            "actionLabel": "A String", # The label that displays as the action menu item.
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
          },
        ],
        "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
        "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
          "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
          "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
        },
        "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
        "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "sectionDividerStyle": "A String", # The divider style between sections.
        "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
          { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
            "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
            "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
            "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
            "widgets": [ # All the widgets in the section. Must contain at least one widget.
              { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                  "buttons": [ # An array of buttons.
                    { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                  ],
                },
                "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                  "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                    { # A column.
                      "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                      "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                      "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                      "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                        { # The supported widgets that you can include in a column.
                          "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                            "buttons": [ # An array of buttons.
                              { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                            ],
                          },
                          "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                            "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                            "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                            "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                            "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                          },
                          "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                            "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                            "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                              },
                              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "text": "A String", # The text displayed inside the button.
                            },
                            "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                            "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                              "controlType": "A String", # How the switch appears in the user interface.
                              "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "selected": True or False, # When `true`, the switch is selected.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                            "topLabel": "A String", # The text that appears above `text`. Always truncates.
                            "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                          },
                          "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                            "altText": "A String", # The alternative text of this image that's used for accessibility.
                            "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                          },
                          "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                            "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                              { # An item that users can select in a selection input, such as a checkbox or switch.
                                "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                "text": "A String", # The text that identifies or describes the item to users.
                                "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                            ],
                            "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                            "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                            "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                            "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                              "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                              "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                    "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  },
                                },
                              },
                            },
                            "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                          },
                          "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                            "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                            "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                              "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                { # One suggested value that users can enter in a text input field.
                                  "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                },
                              ],
                            },
                            "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                            "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                            "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                          },
                          "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                            "text": "A String", # The text that's shown in the widget.
                          },
                        },
                      ],
                    },
                  ],
                },
                "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                  "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                  "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                  "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                  "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                },
                "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                  "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                  "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                    "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                    "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text displayed inside the button.
                  },
                  "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                    "controlType": "A String", # How the switch appears in the user interface.
                    "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "selected": True or False, # When `true`, the switch is selected.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                  "topLabel": "A String", # The text that appears above `text`. Always truncates.
                  "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                },
                "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                },
                "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                  "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                    "cornerRadius": 42, # The corner radius for the border.
                    "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "type": "A String", # The border type.
                  },
                  "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                  "items": [ # The items to display in the grid.
                    { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                      "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                      "image": { # Represents an image. # The image that displays in the grid item.
                        "altText": "A String", # The accessibility label for the image.
                        "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                          "cornerRadius": 42, # The corner radius for the border.
                          "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                            "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                            "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                            "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                            "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                          },
                          "type": "A String", # The border type.
                        },
                        "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                          "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                          "type": "A String", # The crop type.
                        },
                        "imageUri": "A String", # The image URL.
                      },
                      "layout": "A String", # The layout to use for the grid item.
                      "subtitle": "A String", # The grid item's subtitle.
                      "title": "A String", # The grid item's title.
                    },
                  ],
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "title": "A String", # The text that displays in the grid header.
                },
                "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                  "altText": "A String", # The alternative text of this image that's used for accessibility.
                  "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                },
                "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                  "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                    { # An item that users can select in a selection input, such as a checkbox or switch.
                      "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                      "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                      "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                      "text": "A String", # The text that identifies or describes the item to users.
                      "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                  ],
                  "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                  "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                  "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                  "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                    "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                    "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                      "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                        "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                          "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                        },
                      },
                    },
                  },
                  "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                },
                "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                  "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                  "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                    "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                      { # One suggested value that users can enter in a text input field.
                        "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                      },
                    ],
                  },
                  "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                  "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                  "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                },
                "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                  "text": "A String", # The text that's shown in the widget.
                },
              },
            ],
          },
        ],
      },
      "cardId": "A String", # Required if the message contains multiple cards. A unique identifier for a card in a message.
    },
  ],
  "clientAssignedMessageId": "A String", # A custom name for a Chat message assigned at creation. Must start with `client-` and contain only lowercase letters, numbers, and hyphens up to 63 characters in length. Specify this field to get, update, or delete the message with the specified value. Assigning a custom name lets a Chat app recall the message without saving the message `name` from the [response body](/chat/api/reference/rest/v1/spaces.messages/get#response-body) returned when creating the message. Assigning a custom name doesn't replace the generated `name` field, the message's resource name. Instead, it sets the custom name as the `clientAssignedMessageId` field, which you can reference while processing later operations, like updating or deleting the message. For example usage, see [Name a created message](https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message).
  "createTime": "A String", # For spaces created in Chat, the time at which the message was created. This field is output only, except when used in imported spaces. [Developer Preview](https://developers.google.com/workspace/preview): For imported spaces, set this field to the historical timestamp at which the message was created in the source in order to preserve the original creation time.
  "deleteTime": "A String", # Output only. The time at which the message was deleted in Google Chat. If the message is never deleted, this field is empty.
  "deletionMetadata": { # Information about a deleted message. A message is deleted when `delete_time` is set. # Output only. Information about a deleted message. A message is deleted when `delete_time` is set.
    "deletionType": "A String", # Indicates who deleted the message.
  },
  "emojiReactionSummaries": [ # Output only. The list of emoji reaction summaries on the message.
    { # The number of people who reacted to a message with a specific emoji.
      "emoji": { # An emoji that is used as a reaction to a message. # Emoji associated with the reactions.
        "customEmoji": { # Represents a custom emoji. # Output only. A custom emoji.
          "uid": "A String", # Unique key for the custom emoji resource.
        },
        "unicode": "A String", # A basic emoji represented by a unicode string.
      },
      "reactionCount": 42, # The total number of reactions using the associated emoji.
    },
  ],
  "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards can't be displayed—for example, mobile notifications.
  "lastUpdateTime": "A String", # Output only. The time at which the message was last edited by a user. If the message has never been edited, this field is empty.
  "matchedUrl": { # A matched URL in a Chat message. Chat apps can preview matched URLs. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links). # Output only. A URL in `spaces.messages.text` that matches a link preview pattern. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links).
    "url": "A String", # Output only. The URL that was matched.
  },
  "name": "A String", # Resource name in the form `spaces/*/messages/*`. Example: `spaces/AAAAAAAAAAA/messages/BBBBBBBBBBB.BBBBBBBBBBB`
  "quotedMessageMetadata": { # Information about a quoted message. # Output only. Information about a message that's quoted by a Google Chat user in a space. Google Chat users can quote a message to reply to it.
    "lastUpdateTime": "A String", # Output only. The timestamp when the quoted message was created or when the quoted message was last updated.
    "name": "A String", # Output only. Resource name of the quoted message. Format: `spaces/{space}/messages/{message}`
  },
  "sender": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # Output only. The user who created the message. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [user](https://developers.google.com/chat/api/reference/rest/v1/User) `name` and `type`.
    "displayName": "A String", # Output only. The user's display name.
    "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
    "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
    "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
    "type": "A String", # User type.
  },
  "slashCommand": { # A [slash command](https://developers.google.com/chat/how-tos/slash-commands) in Google Chat. # Output only. Slash command information, if applicable.
    "commandId": "A String", # The ID of the slash command invoked.
  },
  "space": { # A space in Google Chat. Spaces are conversations between two or more users or 1:1 messages between a user and a Chat app. # If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [space](https://developers.google.com/chat/api/reference/rest/v1/spaces) `name`.
    "adminInstalled": True or False, # Output only. Whether the Chat app was installed by a Google Workspace administrator. Administrators can install a Chat app for their domain, organizational unit, or a group of users. Administrators can only install Chat apps for direct messaging between users and the app. To support admin install, your app must feature direct messaging.
    "displayName": "A String", # The space's display name. Required when [creating a space](https://developers.google.com/chat/api/reference/rest/v1/spaces/create). If you receive the error message `ALREADY_EXISTS` when creating a space or updating the `displayName`, try a different `displayName`. An existing space within the Google Workspace organization might already use this display name. For direct messages, this field might be empty. Supports up to 128 characters.
    "externalUserAllowed": True or False, # Immutable. Whether this space permits any Google Chat user as a member. Input when creating a space in a Google Workspace organization. For Google Chat users that use a Google Account, omit this field when creating a space (By default, the space permits any Google Chat user). For existing spaces, this field is output only.
    "name": "A String", # Resource name of the space. Format: `spaces/{space}`
    "singleUserBotDm": True or False, # Optional. Whether the space is a DM between a Chat app and a single human.
    "spaceDetails": { # Details about the space including description and rules. # Details about the space including description and rules.
      "description": "A String", # Optional. A description of the space. For example, describe the space's discussion topic, functional purpose, or participants. Supports up to 150 characters.
      "guidelines": "A String", # Optional. The space's rules, expectations, and etiquette. Supports up to 5,000 characters.
    },
    "spaceHistoryState": "A String", # The message history state for messages and threads in this space.
    "spaceThreadingState": "A String", # Output only. The threading state in the Chat space.
    "spaceType": "A String", # The type of space. Required when creating a space or updating the space type of a space. Output only for other usage.
    "threaded": True or False, # Output only. Deprecated: Use `spaceThreadingState` instead. Whether messages are threaded in this space.
    "type": "A String", # Output only. Deprecated: Use `space_type` instead. The type of a space.
  },
  "text": "A String", # Plain-text body of the message. The first link to an image, video, or web page generates a [preview chip](https://developers.google.com/chat/how-tos/preview-links). You can also [@mention a Google Chat user](https://developers.google.com/chat/api/guides/message-formats/text#messages-@mention), or everyone in the space. To learn about creating text messages, see [Create a text message](https://developers.google.com/chat/api/guides/message-formats/text).
  "thread": { # A thread in a Google Chat space. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/v1/messages/create#create-message-thread). If you specify a thread when creating a message, you can set the [`messageReplyOption`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages/create#messagereplyoption) field to determine what happens if no matching thread is found. # The thread the message belongs to. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/crudl/messages#start_or_reply_to_a_message_thread).
    "name": "A String", # Output only. Resource name of the thread. Example: `spaces/{space}/threads/{thread}`
    "threadKey": "A String", # Optional. Input for creating or updating a thread. Otherwise, output only. ID for the thread. Supports up to 4000 characters. This ID is unique to the Chat app that sets it. For example, if multiple Chat apps create a message using the same thread key, the messages are posted in different threads. To reply in a thread created by a person or another Chat app, specify the thread `name` field instead.
  },
  "threadReply": True or False, # Output only. When `true`, the message is a response in a reply thread. When `false`, the message is visible in the space's top-level conversation as either the first message of a thread or a message with no threaded replies. If the space doesn't support reply in threads, this field is always `false`.
}

  messageId: string, Optional. A custom name for a Chat message assigned at creation. Must start with `client-` and contain only lowercase letters, numbers, and hyphens up to 63 characters in length. Specify this field to get, update, or delete the message with the specified value. Assigning a custom name lets a a Chat app recall the message without saving the message `name` from the [response body](/chat/api/reference/rest/v1/spaces.messages/get#response-body) returned when creating the message. Assigning a custom name doesn't replace the generated `name` field, the message's resource name. Instead, it sets the custom name as the `clientAssignedMessageId` field, which you can reference while processing later operations, like updating or deleting the message. For example usage, see [Name a created message](https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message).
  messageReplyOption: string, Optional. Specifies whether a message starts a thread or replies to one. Only supported in named spaces.
    Allowed values
      MESSAGE_REPLY_OPTION_UNSPECIFIED - Default. Starts a thread.
      REPLY_MESSAGE_FALLBACK_TO_NEW_THREAD - Creates the message as a reply to the thread specified by thread ID or `thread_key`. If it fails, the message starts a new thread instead.
      REPLY_MESSAGE_OR_FAIL - Creates the message as a reply to the thread specified by thread ID or `thread_key`. If it fails, a `NOT_FOUND` error is returned instead.
  requestId: string, Optional. A unique request ID for this message. Specifying an existing request ID returns the message created with that ID instead of creating a new message.
  threadKey: string, Optional. Deprecated: Use thread.thread_key instead. ID for the thread. Supports up to 4000 characters. To start or add to a thread, create a message and specify a `threadKey` or the thread.name. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/crudl/messages#start_or_reply_to_a_message_thread).
  x__xgafv: string, V1 error format.
    Allowed values
      1 - v1 error format
      2 - v2 error format

Returns:
  An object of the form:

    { # A message in a Google Chat space.
  "actionResponse": { # Parameters that a Chat app can use to configure how its response is posted. # Input only. Parameters that a Chat app can use to configure how its response is posted.
    "dialogAction": { # Contains a [dialog](https://developers.google.com/chat/how-tos/dialogs) and request status code. # Input only. A response to an event related to a [dialog](https://developers.google.com/chat/how-tos/dialogs). Must be accompanied by `ResponseType.Dialog`.
      "actionStatus": { # Represents the status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). # Input only. Status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). Displays a status and message to users, if necessary. For example, in case of an error or success.
        "statusCode": "A String", # The status code.
        "userFacingMessage": "A String", # The message to send users about the status of their request. If unset, a generic message based on the `status_code` is sent.
      },
      "dialog": { # Wrapper around the card body of the dialog. # Input only. [Dialog](https://developers.google.com/chat/how-tos/dialogs) for the request.
        "body": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # Input only. Body of the dialog, which is rendered in a modal. Google Chat apps don't support the following card entities: `DateTimePicker`, `OnChangeAction`.
          "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
            { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
              "actionLabel": "A String", # The label that displays as the action menu item.
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
            },
          ],
          "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
          "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
            "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
            "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
          },
          "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
          "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "sectionDividerStyle": "A String", # The divider style between sections.
          "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
            { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
              "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
              "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
              "widgets": [ # All the widgets in the section. Must contain at least one widget.
                { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                  "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                    "buttons": [ # An array of buttons.
                      { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                        "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                        "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                          "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                          "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                          "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                          "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                        },
                        "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                        "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                          "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                          "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                          "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                          "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                        },
                        "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                          "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                            "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                            "openAs": "A String", # How to open a link. Not supported by Chat apps.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "text": "A String", # The text displayed inside the button.
                      },
                    ],
                  },
                  "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                    "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                      { # A column.
                        "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                        "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                        "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                        "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                          { # The supported widgets that you can include in a column.
                            "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                              "buttons": [ # An array of buttons.
                                { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                  "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                  "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                    "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                    "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                    "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                    "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                  },
                                  "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                  },
                                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                      "url": "A String", # The URL to open.
                                    },
                                  },
                                  "text": "A String", # The text displayed inside the button.
                                },
                              ],
                            },
                            "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                              "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                              "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                              "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                              "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                            },
                            "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                              "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                              "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                              "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                                "controlType": "A String", # How the switch appears in the user interface.
                                "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "selected": True or False, # When `true`, the switch is selected.
                                "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                              "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                              "topLabel": "A String", # The text that appears above `text`. Always truncates.
                              "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                            },
                            "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                              "altText": "A String", # The alternative text of this image that's used for accessibility.
                              "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                            },
                            "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                              "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                                { # An item that users can select in a selection input, such as a checkbox or switch.
                                  "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                  "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "text": "A String", # The text that identifies or describes the item to users.
                                  "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                },
                              ],
                              "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                              "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                              "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                              "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                                "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                                "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                      "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                    },
                                  },
                                },
                              },
                              "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                            },
                            "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                              "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                              "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                                "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                  { # One suggested value that users can enter in a text input field.
                                    "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                  },
                                ],
                              },
                              "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                              "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                              "text": "A String", # The text that's shown in the widget.
                            },
                          },
                        ],
                      },
                    ],
                  },
                  "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                    "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                    "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                    "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                    "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                  },
                  "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                    "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                    "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                    "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                      "controlType": "A String", # How the switch appears in the user interface.
                      "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "selected": True or False, # When `true`, the switch is selected.
                      "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                    "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                    "topLabel": "A String", # The text that appears above `text`. Always truncates.
                    "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                  },
                  "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                  },
                  "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                    "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                      "cornerRadius": 42, # The corner radius for the border.
                      "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "type": "A String", # The border type.
                    },
                    "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                    "items": [ # The items to display in the grid.
                      { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                        "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                        "image": { # Represents an image. # The image that displays in the grid item.
                          "altText": "A String", # The accessibility label for the image.
                          "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                            "cornerRadius": 42, # The corner radius for the border.
                            "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                            },
                            "type": "A String", # The border type.
                          },
                          "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                            "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                            "type": "A String", # The crop type.
                          },
                          "imageUri": "A String", # The image URL.
                        },
                        "layout": "A String", # The layout to use for the grid item.
                        "subtitle": "A String", # The grid item's subtitle.
                        "title": "A String", # The grid item's title.
                      },
                    ],
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "title": "A String", # The text that displays in the grid header.
                  },
                  "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                  "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                    "altText": "A String", # The alternative text of this image that's used for accessibility.
                    "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                    "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                      { # An item that users can select in a selection input, such as a checkbox or switch.
                        "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                        "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                        "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                        "text": "A String", # The text that identifies or describes the item to users.
                        "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      },
                    ],
                    "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                    "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                    "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                    "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                      "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                      "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                        "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                          "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                            "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                          },
                        },
                      },
                    },
                    "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                  },
                  "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                    "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                    "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                      "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                        { # One suggested value that users can enter in a text input field.
                          "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                        },
                      ],
                    },
                    "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                    "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                    "text": "A String", # The text that's shown in the widget.
                  },
                },
              ],
            },
          ],
        },
      },
    },
    "type": "A String", # Input only. The type of Chat app response.
    "url": "A String", # Input only. URL for users to authenticate or configure. (Only for `REQUEST_CONFIG` response types.)
  },
  "annotations": [ # Output only. Annotations associated with the `text` in this message.
    { # Output only. Annotations associated with the plain-text body of the message. To add basic formatting to a text message, see [Format text messages](https://developers.google.com/chat/api/guides/message-formats/text#format-texts). Example plain-text message body: ``` Hello @FooBot how are you!" ``` The corresponding annotations metadata: ``` "annotations":[{ "type":"USER_MENTION", "startIndex":6, "length":7, "userMention": { "user": { "name":"users/{user}", "displayName":"FooBot", "avatarUrl":"https://goo.gl/aeDtrS", "type":"BOT" }, "type":"MENTION" } }] ```
      "length": 42, # Length of the substring in the plain-text message body this annotation corresponds to.
      "slashCommand": { # Annotation metadata for slash commands (/). # The metadata for a slash command.
        "bot": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The Chat app whose command was invoked.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
        "commandId": "A String", # The command ID of the invoked slash command.
        "commandName": "A String", # The name of the invoked slash command.
        "triggersDialog": True or False, # Indicates whether the slash command is for a dialog.
        "type": "A String", # The type of slash command.
      },
      "startIndex": 42, # Start index (0-based, inclusive) in the plain-text message body this annotation corresponds to.
      "type": "A String", # The type of this annotation.
      "userMention": { # Annotation metadata for user mentions (@). # The metadata of user mention.
        "type": "A String", # The type of user mention.
        "user": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The user mentioned.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
      },
    },
  ],
  "argumentText": "A String", # Output only. Plain-text body of the message with all Chat app mentions stripped out.
  "attachedGifs": [ # Output only. GIF images that are attached to the message.
    { # A GIF image that's specified by a URL.
      "uri": "A String", # Output only. The URL that hosts the GIF image.
    },
  ],
  "attachment": [ # User-uploaded attachment.
    { # An attachment in Google Chat.
      "attachmentDataRef": { # A reference to the attachment data. This field is used with the media API to download the attachment data.
        "attachmentUploadToken": "A String", # Opaque token containing a reference to an uploaded attachment. Treated by clients as an opaque string and used to create or update Chat messages with attachments.
        "resourceName": "A String", # The resource name of the attachment data. This field is used with the media API to download the attachment data.
      },
      "contentName": "A String", # Output only. The original file name for the content, not the full path.
      "contentType": "A String", # Output only. The content type (MIME type) of the file.
      "downloadUri": "A String", # Output only. The download URL which should be used to allow a human user to download the attachment. Chat apps shouldn't use this URL to download attachment content.
      "driveDataRef": { # A reference to the data of a drive attachment. # Output only. A reference to the Google Drive attachment. This field is used with the Google Drive API.
        "driveFileId": "A String", # The ID for the drive file. Use with the Drive API.
      },
      "name": "A String", # Resource name of the attachment, in the form `spaces/*/messages/*/attachments/*`.
      "source": "A String", # Output only. The source of the attachment.
      "thumbnailUri": "A String", # Output only. The thumbnail URL which should be used to preview the attachment to a human user. Chat apps shouldn't use this URL to download attachment content.
    },
  ],
  "cards": [ # Deprecated: Use `cards_v2` instead. Rich, formatted, and interactive cards that you can use to display UI elements such as: formatted texts, buttons, and clickable images. Cards are normally displayed below the plain-text body of the message. `cards` and `cards_v2` can have a maximum size of 32 KB.
    { # A card is a UI element that can contain UI widgets such as text and images.
      "cardActions": [ # The actions of this card.
        { # A card action is the action associated with the card. For an invoice card, a typical action would be: delete invoice, email invoice or open the invoice in browser. Not supported by Google Chat apps.
          "actionLabel": "A String", # The label used to be displayed in the action menu item.
          "onClick": { # An `onclick` action (for example, open a link). # The onclick action for this action item.
            "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
              "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
              "parameters": [ # List of action parameters.
                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                  "key": "A String", # The name of the parameter for the action script.
                  "value": "A String", # The value of the parameter.
                },
              ],
            },
            "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
              "url": "A String", # The URL to open.
            },
          },
        },
      ],
      "header": { # The header of the card. A header usually contains a title and an image.
        "imageStyle": "A String", # The image's type (for example, square border or circular border).
        "imageUrl": "A String", # The URL of the image in the card header.
        "subtitle": "A String", # The subtitle of the card header.
        "title": "A String", # The title must be specified. The header has a fixed height: if both a title and subtitle is specified, each takes up one line. If only the title is specified, it takes up both lines.
      },
      "name": "A String", # Name of the card.
      "sections": [ # Sections are separated by a line divider.
        { # A section contains a collection of widgets that are rendered (vertically) in the order that they are specified. Across all platforms, cards have a narrow fixed width, so there's currently no need for layout properties (for example, float).
          "header": "A String", # The header of the section. Formatted text is supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
          "widgets": [ # A section must contain at least one widget.
            { # A widget is a UI element that presents text and images.
              "buttons": [ # A list of buttons. Buttons is also `oneof data` and only one of these fields should be set.
                { # A button. Can be a text button or an image button.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
              ],
              "image": { # An image that's specified by a URL and can have an `onclick` action. # Display an image in this widget.
                "aspectRatio": 3.14, # The aspect ratio of this image (width and height). This field lets you reserve the right height for the image while waiting for it to load. It's not meant to override the built-in aspect ratio of the image. If unset, the server fills it by prefetching the image.
                "imageUrl": "A String", # The URL of the image.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
              },
              "keyValue": { # A UI element contains a key (label) and a value (content). This element can also contain some actions such as `onclick` button. # Display a key value item in this widget.
                "bottomLabel": "A String", # The text of the bottom label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "button": { # A button. Can be a text button or an image button. # A button that can be clicked to trigger an action.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
                "content": "A String", # The text of the content. Formatted text supported and always required. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "contentMultiline": True or False, # If the content should be multiline.
                "icon": "A String", # An enum value that's replaced by the Chat API with the corresponding icon image.
                "iconUrl": "A String", # The icon specified by a URL.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action. Only the top label, bottom label, and content region are clickable.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
                "topLabel": "A String", # The text of the top label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              },
              "textParagraph": { # A paragraph of text. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Display a text paragraph in this widget.
                "text": "A String",
              },
            },
          ],
        },
      ],
    },
  ],
  "cardsV2": [ # An array of [cards](https://developers.google.com/chat/api/reference/rest/v1/cards). Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the messages can't contain cards. To learn about cards and how to create them, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui).
    { # A [card](https://developers.google.com/chat/api/reference/rest/v1/cards) in a Google Chat message. Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the message can't contain cards.
      "card": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # A card. Maximum size is 32 KB.
        "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
          { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
            "actionLabel": "A String", # The label that displays as the action menu item.
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
          },
        ],
        "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
        "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
          "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
          "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
        },
        "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
        "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "sectionDividerStyle": "A String", # The divider style between sections.
        "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
          { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
            "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
            "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
            "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
            "widgets": [ # All the widgets in the section. Must contain at least one widget.
              { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                  "buttons": [ # An array of buttons.
                    { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                  ],
                },
                "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                  "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                    { # A column.
                      "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                      "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                      "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                      "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                        { # The supported widgets that you can include in a column.
                          "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                            "buttons": [ # An array of buttons.
                              { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                            ],
                          },
                          "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                            "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                            "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                            "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                            "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                          },
                          "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                            "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                            "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                              },
                              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "text": "A String", # The text displayed inside the button.
                            },
                            "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                            "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                              "controlType": "A String", # How the switch appears in the user interface.
                              "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "selected": True or False, # When `true`, the switch is selected.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                            "topLabel": "A String", # The text that appears above `text`. Always truncates.
                            "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                          },
                          "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                            "altText": "A String", # The alternative text of this image that's used for accessibility.
                            "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                          },
                          "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                            "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                              { # An item that users can select in a selection input, such as a checkbox or switch.
                                "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                "text": "A String", # The text that identifies or describes the item to users.
                                "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                            ],
                            "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                            "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                            "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                            "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                              "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                              "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                    "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  },
                                },
                              },
                            },
                            "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                          },
                          "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                            "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                            "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                              "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                { # One suggested value that users can enter in a text input field.
                                  "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                },
                              ],
                            },
                            "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                            "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                            "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                          },
                          "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                            "text": "A String", # The text that's shown in the widget.
                          },
                        },
                      ],
                    },
                  ],
                },
                "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                  "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                  "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                  "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                  "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                },
                "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                  "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                  "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                    "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                    "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text displayed inside the button.
                  },
                  "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                    "controlType": "A String", # How the switch appears in the user interface.
                    "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "selected": True or False, # When `true`, the switch is selected.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                  "topLabel": "A String", # The text that appears above `text`. Always truncates.
                  "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                },
                "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                },
                "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                  "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                    "cornerRadius": 42, # The corner radius for the border.
                    "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "type": "A String", # The border type.
                  },
                  "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                  "items": [ # The items to display in the grid.
                    { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                      "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                      "image": { # Represents an image. # The image that displays in the grid item.
                        "altText": "A String", # The accessibility label for the image.
                        "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                          "cornerRadius": 42, # The corner radius for the border.
                          "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                            "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                            "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                            "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                            "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                          },
                          "type": "A String", # The border type.
                        },
                        "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                          "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                          "type": "A String", # The crop type.
                        },
                        "imageUri": "A String", # The image URL.
                      },
                      "layout": "A String", # The layout to use for the grid item.
                      "subtitle": "A String", # The grid item's subtitle.
                      "title": "A String", # The grid item's title.
                    },
                  ],
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "title": "A String", # The text that displays in the grid header.
                },
                "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                  "altText": "A String", # The alternative text of this image that's used for accessibility.
                  "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                },
                "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                  "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                    { # An item that users can select in a selection input, such as a checkbox or switch.
                      "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                      "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                      "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                      "text": "A String", # The text that identifies or describes the item to users.
                      "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                  ],
                  "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                  "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                  "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                  "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                    "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                    "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                      "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                        "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                          "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                        },
                      },
                    },
                  },
                  "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                },
                "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                  "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                  "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                    "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                      { # One suggested value that users can enter in a text input field.
                        "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                      },
                    ],
                  },
                  "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                  "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                  "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                },
                "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                  "text": "A String", # The text that's shown in the widget.
                },
              },
            ],
          },
        ],
      },
      "cardId": "A String", # Required if the message contains multiple cards. A unique identifier for a card in a message.
    },
  ],
  "clientAssignedMessageId": "A String", # A custom name for a Chat message assigned at creation. Must start with `client-` and contain only lowercase letters, numbers, and hyphens up to 63 characters in length. Specify this field to get, update, or delete the message with the specified value. Assigning a custom name lets a Chat app recall the message without saving the message `name` from the [response body](/chat/api/reference/rest/v1/spaces.messages/get#response-body) returned when creating the message. Assigning a custom name doesn't replace the generated `name` field, the message's resource name. Instead, it sets the custom name as the `clientAssignedMessageId` field, which you can reference while processing later operations, like updating or deleting the message. For example usage, see [Name a created message](https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message).
  "createTime": "A String", # For spaces created in Chat, the time at which the message was created. This field is output only, except when used in imported spaces. [Developer Preview](https://developers.google.com/workspace/preview): For imported spaces, set this field to the historical timestamp at which the message was created in the source in order to preserve the original creation time.
  "deleteTime": "A String", # Output only. The time at which the message was deleted in Google Chat. If the message is never deleted, this field is empty.
  "deletionMetadata": { # Information about a deleted message. A message is deleted when `delete_time` is set. # Output only. Information about a deleted message. A message is deleted when `delete_time` is set.
    "deletionType": "A String", # Indicates who deleted the message.
  },
  "emojiReactionSummaries": [ # Output only. The list of emoji reaction summaries on the message.
    { # The number of people who reacted to a message with a specific emoji.
      "emoji": { # An emoji that is used as a reaction to a message. # Emoji associated with the reactions.
        "customEmoji": { # Represents a custom emoji. # Output only. A custom emoji.
          "uid": "A String", # Unique key for the custom emoji resource.
        },
        "unicode": "A String", # A basic emoji represented by a unicode string.
      },
      "reactionCount": 42, # The total number of reactions using the associated emoji.
    },
  ],
  "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards can't be displayed—for example, mobile notifications.
  "lastUpdateTime": "A String", # Output only. The time at which the message was last edited by a user. If the message has never been edited, this field is empty.
  "matchedUrl": { # A matched URL in a Chat message. Chat apps can preview matched URLs. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links). # Output only. A URL in `spaces.messages.text` that matches a link preview pattern. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links).
    "url": "A String", # Output only. The URL that was matched.
  },
  "name": "A String", # Resource name in the form `spaces/*/messages/*`. Example: `spaces/AAAAAAAAAAA/messages/BBBBBBBBBBB.BBBBBBBBBBB`
  "quotedMessageMetadata": { # Information about a quoted message. # Output only. Information about a message that's quoted by a Google Chat user in a space. Google Chat users can quote a message to reply to it.
    "lastUpdateTime": "A String", # Output only. The timestamp when the quoted message was created or when the quoted message was last updated.
    "name": "A String", # Output only. Resource name of the quoted message. Format: `spaces/{space}/messages/{message}`
  },
  "sender": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # Output only. The user who created the message. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [user](https://developers.google.com/chat/api/reference/rest/v1/User) `name` and `type`.
    "displayName": "A String", # Output only. The user's display name.
    "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
    "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
    "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
    "type": "A String", # User type.
  },
  "slashCommand": { # A [slash command](https://developers.google.com/chat/how-tos/slash-commands) in Google Chat. # Output only. Slash command information, if applicable.
    "commandId": "A String", # The ID of the slash command invoked.
  },
  "space": { # A space in Google Chat. Spaces are conversations between two or more users or 1:1 messages between a user and a Chat app. # If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [space](https://developers.google.com/chat/api/reference/rest/v1/spaces) `name`.
    "adminInstalled": True or False, # Output only. Whether the Chat app was installed by a Google Workspace administrator. Administrators can install a Chat app for their domain, organizational unit, or a group of users. Administrators can only install Chat apps for direct messaging between users and the app. To support admin install, your app must feature direct messaging.
    "displayName": "A String", # The space's display name. Required when [creating a space](https://developers.google.com/chat/api/reference/rest/v1/spaces/create). If you receive the error message `ALREADY_EXISTS` when creating a space or updating the `displayName`, try a different `displayName`. An existing space within the Google Workspace organization might already use this display name. For direct messages, this field might be empty. Supports up to 128 characters.
    "externalUserAllowed": True or False, # Immutable. Whether this space permits any Google Chat user as a member. Input when creating a space in a Google Workspace organization. For Google Chat users that use a Google Account, omit this field when creating a space (By default, the space permits any Google Chat user). For existing spaces, this field is output only.
    "name": "A String", # Resource name of the space. Format: `spaces/{space}`
    "singleUserBotDm": True or False, # Optional. Whether the space is a DM between a Chat app and a single human.
    "spaceDetails": { # Details about the space including description and rules. # Details about the space including description and rules.
      "description": "A String", # Optional. A description of the space. For example, describe the space's discussion topic, functional purpose, or participants. Supports up to 150 characters.
      "guidelines": "A String", # Optional. The space's rules, expectations, and etiquette. Supports up to 5,000 characters.
    },
    "spaceHistoryState": "A String", # The message history state for messages and threads in this space.
    "spaceThreadingState": "A String", # Output only. The threading state in the Chat space.
    "spaceType": "A String", # The type of space. Required when creating a space or updating the space type of a space. Output only for other usage.
    "threaded": True or False, # Output only. Deprecated: Use `spaceThreadingState` instead. Whether messages are threaded in this space.
    "type": "A String", # Output only. Deprecated: Use `space_type` instead. The type of a space.
  },
  "text": "A String", # Plain-text body of the message. The first link to an image, video, or web page generates a [preview chip](https://developers.google.com/chat/how-tos/preview-links). You can also [@mention a Google Chat user](https://developers.google.com/chat/api/guides/message-formats/text#messages-@mention), or everyone in the space. To learn about creating text messages, see [Create a text message](https://developers.google.com/chat/api/guides/message-formats/text).
  "thread": { # A thread in a Google Chat space. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/v1/messages/create#create-message-thread). If you specify a thread when creating a message, you can set the [`messageReplyOption`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages/create#messagereplyoption) field to determine what happens if no matching thread is found. # The thread the message belongs to. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/crudl/messages#start_or_reply_to_a_message_thread).
    "name": "A String", # Output only. Resource name of the thread. Example: `spaces/{space}/threads/{thread}`
    "threadKey": "A String", # Optional. Input for creating or updating a thread. Otherwise, output only. ID for the thread. Supports up to 4000 characters. This ID is unique to the Chat app that sets it. For example, if multiple Chat apps create a message using the same thread key, the messages are posted in different threads. To reply in a thread created by a person or another Chat app, specify the thread `name` field instead.
  },
  "threadReply": True or False, # Output only. When `true`, the message is a response in a reply thread. When `false`, the message is visible in the space's top-level conversation as either the first message of a thread or a message with no threaded replies. If the space doesn't support reply in threads, this field is always `false`.
}
delete(name, force=None, x__xgafv=None)
Deletes a message. For an example, see [Delete a message](https://developers.google.com/chat/api/guides/v1/messages/delete). Requires [authentication](https://developers.google.com/chat/api/guides/auth). Fully supports [service account authentication](https://developers.google.com/chat/api/guides/auth/service-accounts) and [user authentication](https://developers.google.com/chat/api/guides/auth/users). [User authentication](https://developers.google.com/chat/api/guides/auth/users). Requests authenticated with service accounts can only delete messages created by the calling Chat app.

Args:
  name: string, Required. Resource name of the message that you want to delete, in the form `spaces/*/messages/*` Example: `spaces/AAAAAAAAAAA/messages/BBBBBBBBBBB.BBBBBBBBBBB` (required)
  force: boolean, When `true`, deleting a message also deletes its threaded replies. When `false`, if a message has threaded replies, deletion fails. Only applies when [authenticating as a user](https://developers.google.com/chat/api/guides/auth/users). Has no effect when [authenticating with a service account] (https://developers.google.com/chat/api/guides/auth/service-accounts).
  x__xgafv: string, V1 error format.
    Allowed values
      1 - v1 error format
      2 - v2 error format

Returns:
  An object of the form:

    { # A generic empty message that you can re-use to avoid defining duplicated empty messages in your APIs. A typical example is to use it as the request or the response type of an API method. For instance: service Foo { rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty); }
}
get(name, x__xgafv=None)
Returns details about a message. For an example, see [Read a message](https://developers.google.com/chat/api/guides/v1/messages/get). Requires [authentication](https://developers.google.com/chat/api/guides/auth). Fully supports [service account authentication](https://developers.google.com/chat/api/guides/auth/service-accounts) and [user authentication](https://developers.google.com/chat/api/guides/auth/users). [User authentication](https://developers.google.com/chat/api/guides/auth/users). Note: Might return a message from a blocked member or space.

Args:
  name: string, Required. Resource name of the message to retrieve. Format: `spaces/{space}/messages/{message}` If the message begins with `client-`, then it has a custom name assigned by a Chat app that created it with the Chat REST API. That Chat app (but not others) can pass the custom name to get, update, or delete the message. To learn more, see [create and name a message] (https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message). (required)
  x__xgafv: string, V1 error format.
    Allowed values
      1 - v1 error format
      2 - v2 error format

Returns:
  An object of the form:

    { # A message in a Google Chat space.
  "actionResponse": { # Parameters that a Chat app can use to configure how its response is posted. # Input only. Parameters that a Chat app can use to configure how its response is posted.
    "dialogAction": { # Contains a [dialog](https://developers.google.com/chat/how-tos/dialogs) and request status code. # Input only. A response to an event related to a [dialog](https://developers.google.com/chat/how-tos/dialogs). Must be accompanied by `ResponseType.Dialog`.
      "actionStatus": { # Represents the status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). # Input only. Status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). Displays a status and message to users, if necessary. For example, in case of an error or success.
        "statusCode": "A String", # The status code.
        "userFacingMessage": "A String", # The message to send users about the status of their request. If unset, a generic message based on the `status_code` is sent.
      },
      "dialog": { # Wrapper around the card body of the dialog. # Input only. [Dialog](https://developers.google.com/chat/how-tos/dialogs) for the request.
        "body": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # Input only. Body of the dialog, which is rendered in a modal. Google Chat apps don't support the following card entities: `DateTimePicker`, `OnChangeAction`.
          "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
            { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
              "actionLabel": "A String", # The label that displays as the action menu item.
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
            },
          ],
          "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
          "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
            "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
            "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
          },
          "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
          "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "sectionDividerStyle": "A String", # The divider style between sections.
          "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
            { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
              "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
              "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
              "widgets": [ # All the widgets in the section. Must contain at least one widget.
                { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                  "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                    "buttons": [ # An array of buttons.
                      { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                        "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                        "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                          "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                          "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                          "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                          "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                        },
                        "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                        "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                          "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                          "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                          "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                          "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                        },
                        "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                          "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                            "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                            "openAs": "A String", # How to open a link. Not supported by Chat apps.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "text": "A String", # The text displayed inside the button.
                      },
                    ],
                  },
                  "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                    "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                      { # A column.
                        "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                        "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                        "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                        "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                          { # The supported widgets that you can include in a column.
                            "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                              "buttons": [ # An array of buttons.
                                { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                  "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                  "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                    "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                    "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                    "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                    "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                  },
                                  "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                  },
                                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                      "url": "A String", # The URL to open.
                                    },
                                  },
                                  "text": "A String", # The text displayed inside the button.
                                },
                              ],
                            },
                            "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                              "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                              "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                              "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                              "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                            },
                            "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                              "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                              "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                              "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                                "controlType": "A String", # How the switch appears in the user interface.
                                "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "selected": True or False, # When `true`, the switch is selected.
                                "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                              "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                              "topLabel": "A String", # The text that appears above `text`. Always truncates.
                              "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                            },
                            "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                              "altText": "A String", # The alternative text of this image that's used for accessibility.
                              "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                            },
                            "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                              "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                                { # An item that users can select in a selection input, such as a checkbox or switch.
                                  "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                  "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "text": "A String", # The text that identifies or describes the item to users.
                                  "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                },
                              ],
                              "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                              "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                              "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                              "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                                "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                                "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                      "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                    },
                                  },
                                },
                              },
                              "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                            },
                            "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                              "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                              "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                                "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                  { # One suggested value that users can enter in a text input field.
                                    "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                  },
                                ],
                              },
                              "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                              "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                              "text": "A String", # The text that's shown in the widget.
                            },
                          },
                        ],
                      },
                    ],
                  },
                  "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                    "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                    "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                    "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                    "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                  },
                  "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                    "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                    "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                    "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                      "controlType": "A String", # How the switch appears in the user interface.
                      "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "selected": True or False, # When `true`, the switch is selected.
                      "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                    "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                    "topLabel": "A String", # The text that appears above `text`. Always truncates.
                    "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                  },
                  "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                  },
                  "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                    "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                      "cornerRadius": 42, # The corner radius for the border.
                      "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "type": "A String", # The border type.
                    },
                    "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                    "items": [ # The items to display in the grid.
                      { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                        "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                        "image": { # Represents an image. # The image that displays in the grid item.
                          "altText": "A String", # The accessibility label for the image.
                          "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                            "cornerRadius": 42, # The corner radius for the border.
                            "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                            },
                            "type": "A String", # The border type.
                          },
                          "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                            "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                            "type": "A String", # The crop type.
                          },
                          "imageUri": "A String", # The image URL.
                        },
                        "layout": "A String", # The layout to use for the grid item.
                        "subtitle": "A String", # The grid item's subtitle.
                        "title": "A String", # The grid item's title.
                      },
                    ],
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "title": "A String", # The text that displays in the grid header.
                  },
                  "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                  "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                    "altText": "A String", # The alternative text of this image that's used for accessibility.
                    "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                    "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                      { # An item that users can select in a selection input, such as a checkbox or switch.
                        "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                        "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                        "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                        "text": "A String", # The text that identifies or describes the item to users.
                        "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      },
                    ],
                    "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                    "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                    "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                    "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                      "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                      "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                        "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                          "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                            "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                          },
                        },
                      },
                    },
                    "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                  },
                  "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                    "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                    "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                      "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                        { # One suggested value that users can enter in a text input field.
                          "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                        },
                      ],
                    },
                    "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                    "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                    "text": "A String", # The text that's shown in the widget.
                  },
                },
              ],
            },
          ],
        },
      },
    },
    "type": "A String", # Input only. The type of Chat app response.
    "url": "A String", # Input only. URL for users to authenticate or configure. (Only for `REQUEST_CONFIG` response types.)
  },
  "annotations": [ # Output only. Annotations associated with the `text` in this message.
    { # Output only. Annotations associated with the plain-text body of the message. To add basic formatting to a text message, see [Format text messages](https://developers.google.com/chat/api/guides/message-formats/text#format-texts). Example plain-text message body: ``` Hello @FooBot how are you!" ``` The corresponding annotations metadata: ``` "annotations":[{ "type":"USER_MENTION", "startIndex":6, "length":7, "userMention": { "user": { "name":"users/{user}", "displayName":"FooBot", "avatarUrl":"https://goo.gl/aeDtrS", "type":"BOT" }, "type":"MENTION" } }] ```
      "length": 42, # Length of the substring in the plain-text message body this annotation corresponds to.
      "slashCommand": { # Annotation metadata for slash commands (/). # The metadata for a slash command.
        "bot": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The Chat app whose command was invoked.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
        "commandId": "A String", # The command ID of the invoked slash command.
        "commandName": "A String", # The name of the invoked slash command.
        "triggersDialog": True or False, # Indicates whether the slash command is for a dialog.
        "type": "A String", # The type of slash command.
      },
      "startIndex": 42, # Start index (0-based, inclusive) in the plain-text message body this annotation corresponds to.
      "type": "A String", # The type of this annotation.
      "userMention": { # Annotation metadata for user mentions (@). # The metadata of user mention.
        "type": "A String", # The type of user mention.
        "user": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The user mentioned.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
      },
    },
  ],
  "argumentText": "A String", # Output only. Plain-text body of the message with all Chat app mentions stripped out.
  "attachedGifs": [ # Output only. GIF images that are attached to the message.
    { # A GIF image that's specified by a URL.
      "uri": "A String", # Output only. The URL that hosts the GIF image.
    },
  ],
  "attachment": [ # User-uploaded attachment.
    { # An attachment in Google Chat.
      "attachmentDataRef": { # A reference to the attachment data. This field is used with the media API to download the attachment data.
        "attachmentUploadToken": "A String", # Opaque token containing a reference to an uploaded attachment. Treated by clients as an opaque string and used to create or update Chat messages with attachments.
        "resourceName": "A String", # The resource name of the attachment data. This field is used with the media API to download the attachment data.
      },
      "contentName": "A String", # Output only. The original file name for the content, not the full path.
      "contentType": "A String", # Output only. The content type (MIME type) of the file.
      "downloadUri": "A String", # Output only. The download URL which should be used to allow a human user to download the attachment. Chat apps shouldn't use this URL to download attachment content.
      "driveDataRef": { # A reference to the data of a drive attachment. # Output only. A reference to the Google Drive attachment. This field is used with the Google Drive API.
        "driveFileId": "A String", # The ID for the drive file. Use with the Drive API.
      },
      "name": "A String", # Resource name of the attachment, in the form `spaces/*/messages/*/attachments/*`.
      "source": "A String", # Output only. The source of the attachment.
      "thumbnailUri": "A String", # Output only. The thumbnail URL which should be used to preview the attachment to a human user. Chat apps shouldn't use this URL to download attachment content.
    },
  ],
  "cards": [ # Deprecated: Use `cards_v2` instead. Rich, formatted, and interactive cards that you can use to display UI elements such as: formatted texts, buttons, and clickable images. Cards are normally displayed below the plain-text body of the message. `cards` and `cards_v2` can have a maximum size of 32 KB.
    { # A card is a UI element that can contain UI widgets such as text and images.
      "cardActions": [ # The actions of this card.
        { # A card action is the action associated with the card. For an invoice card, a typical action would be: delete invoice, email invoice or open the invoice in browser. Not supported by Google Chat apps.
          "actionLabel": "A String", # The label used to be displayed in the action menu item.
          "onClick": { # An `onclick` action (for example, open a link). # The onclick action for this action item.
            "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
              "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
              "parameters": [ # List of action parameters.
                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                  "key": "A String", # The name of the parameter for the action script.
                  "value": "A String", # The value of the parameter.
                },
              ],
            },
            "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
              "url": "A String", # The URL to open.
            },
          },
        },
      ],
      "header": { # The header of the card. A header usually contains a title and an image.
        "imageStyle": "A String", # The image's type (for example, square border or circular border).
        "imageUrl": "A String", # The URL of the image in the card header.
        "subtitle": "A String", # The subtitle of the card header.
        "title": "A String", # The title must be specified. The header has a fixed height: if both a title and subtitle is specified, each takes up one line. If only the title is specified, it takes up both lines.
      },
      "name": "A String", # Name of the card.
      "sections": [ # Sections are separated by a line divider.
        { # A section contains a collection of widgets that are rendered (vertically) in the order that they are specified. Across all platforms, cards have a narrow fixed width, so there's currently no need for layout properties (for example, float).
          "header": "A String", # The header of the section. Formatted text is supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
          "widgets": [ # A section must contain at least one widget.
            { # A widget is a UI element that presents text and images.
              "buttons": [ # A list of buttons. Buttons is also `oneof data` and only one of these fields should be set.
                { # A button. Can be a text button or an image button.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
              ],
              "image": { # An image that's specified by a URL and can have an `onclick` action. # Display an image in this widget.
                "aspectRatio": 3.14, # The aspect ratio of this image (width and height). This field lets you reserve the right height for the image while waiting for it to load. It's not meant to override the built-in aspect ratio of the image. If unset, the server fills it by prefetching the image.
                "imageUrl": "A String", # The URL of the image.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
              },
              "keyValue": { # A UI element contains a key (label) and a value (content). This element can also contain some actions such as `onclick` button. # Display a key value item in this widget.
                "bottomLabel": "A String", # The text of the bottom label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "button": { # A button. Can be a text button or an image button. # A button that can be clicked to trigger an action.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
                "content": "A String", # The text of the content. Formatted text supported and always required. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "contentMultiline": True or False, # If the content should be multiline.
                "icon": "A String", # An enum value that's replaced by the Chat API with the corresponding icon image.
                "iconUrl": "A String", # The icon specified by a URL.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action. Only the top label, bottom label, and content region are clickable.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
                "topLabel": "A String", # The text of the top label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              },
              "textParagraph": { # A paragraph of text. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Display a text paragraph in this widget.
                "text": "A String",
              },
            },
          ],
        },
      ],
    },
  ],
  "cardsV2": [ # An array of [cards](https://developers.google.com/chat/api/reference/rest/v1/cards). Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the messages can't contain cards. To learn about cards and how to create them, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui).
    { # A [card](https://developers.google.com/chat/api/reference/rest/v1/cards) in a Google Chat message. Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the message can't contain cards.
      "card": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # A card. Maximum size is 32 KB.
        "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
          { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
            "actionLabel": "A String", # The label that displays as the action menu item.
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
          },
        ],
        "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
        "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
          "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
          "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
        },
        "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
        "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "sectionDividerStyle": "A String", # The divider style between sections.
        "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
          { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
            "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
            "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
            "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
            "widgets": [ # All the widgets in the section. Must contain at least one widget.
              { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                  "buttons": [ # An array of buttons.
                    { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                  ],
                },
                "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                  "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                    { # A column.
                      "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                      "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                      "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                      "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                        { # The supported widgets that you can include in a column.
                          "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                            "buttons": [ # An array of buttons.
                              { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                            ],
                          },
                          "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                            "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                            "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                            "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                            "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                          },
                          "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                            "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                            "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                              },
                              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "text": "A String", # The text displayed inside the button.
                            },
                            "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                            "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                              "controlType": "A String", # How the switch appears in the user interface.
                              "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "selected": True or False, # When `true`, the switch is selected.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                            "topLabel": "A String", # The text that appears above `text`. Always truncates.
                            "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                          },
                          "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                            "altText": "A String", # The alternative text of this image that's used for accessibility.
                            "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                          },
                          "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                            "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                              { # An item that users can select in a selection input, such as a checkbox or switch.
                                "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                "text": "A String", # The text that identifies or describes the item to users.
                                "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                            ],
                            "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                            "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                            "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                            "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                              "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                              "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                    "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  },
                                },
                              },
                            },
                            "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                          },
                          "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                            "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                            "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                              "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                { # One suggested value that users can enter in a text input field.
                                  "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                },
                              ],
                            },
                            "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                            "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                            "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                          },
                          "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                            "text": "A String", # The text that's shown in the widget.
                          },
                        },
                      ],
                    },
                  ],
                },
                "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                  "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                  "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                  "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                  "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                },
                "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                  "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                  "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                    "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                    "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text displayed inside the button.
                  },
                  "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                    "controlType": "A String", # How the switch appears in the user interface.
                    "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "selected": True or False, # When `true`, the switch is selected.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                  "topLabel": "A String", # The text that appears above `text`. Always truncates.
                  "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                },
                "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                },
                "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                  "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                    "cornerRadius": 42, # The corner radius for the border.
                    "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "type": "A String", # The border type.
                  },
                  "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                  "items": [ # The items to display in the grid.
                    { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                      "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                      "image": { # Represents an image. # The image that displays in the grid item.
                        "altText": "A String", # The accessibility label for the image.
                        "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                          "cornerRadius": 42, # The corner radius for the border.
                          "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                            "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                            "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                            "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                            "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                          },
                          "type": "A String", # The border type.
                        },
                        "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                          "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                          "type": "A String", # The crop type.
                        },
                        "imageUri": "A String", # The image URL.
                      },
                      "layout": "A String", # The layout to use for the grid item.
                      "subtitle": "A String", # The grid item's subtitle.
                      "title": "A String", # The grid item's title.
                    },
                  ],
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "title": "A String", # The text that displays in the grid header.
                },
                "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                  "altText": "A String", # The alternative text of this image that's used for accessibility.
                  "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                },
                "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                  "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                    { # An item that users can select in a selection input, such as a checkbox or switch.
                      "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                      "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                      "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                      "text": "A String", # The text that identifies or describes the item to users.
                      "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                  ],
                  "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                  "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                  "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                  "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                    "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                    "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                      "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                        "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                          "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                        },
                      },
                    },
                  },
                  "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                },
                "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                  "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                  "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                    "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                      { # One suggested value that users can enter in a text input field.
                        "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                      },
                    ],
                  },
                  "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                  "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                  "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                },
                "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                  "text": "A String", # The text that's shown in the widget.
                },
              },
            ],
          },
        ],
      },
      "cardId": "A String", # Required if the message contains multiple cards. A unique identifier for a card in a message.
    },
  ],
  "clientAssignedMessageId": "A String", # A custom name for a Chat message assigned at creation. Must start with `client-` and contain only lowercase letters, numbers, and hyphens up to 63 characters in length. Specify this field to get, update, or delete the message with the specified value. Assigning a custom name lets a Chat app recall the message without saving the message `name` from the [response body](/chat/api/reference/rest/v1/spaces.messages/get#response-body) returned when creating the message. Assigning a custom name doesn't replace the generated `name` field, the message's resource name. Instead, it sets the custom name as the `clientAssignedMessageId` field, which you can reference while processing later operations, like updating or deleting the message. For example usage, see [Name a created message](https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message).
  "createTime": "A String", # For spaces created in Chat, the time at which the message was created. This field is output only, except when used in imported spaces. [Developer Preview](https://developers.google.com/workspace/preview): For imported spaces, set this field to the historical timestamp at which the message was created in the source in order to preserve the original creation time.
  "deleteTime": "A String", # Output only. The time at which the message was deleted in Google Chat. If the message is never deleted, this field is empty.
  "deletionMetadata": { # Information about a deleted message. A message is deleted when `delete_time` is set. # Output only. Information about a deleted message. A message is deleted when `delete_time` is set.
    "deletionType": "A String", # Indicates who deleted the message.
  },
  "emojiReactionSummaries": [ # Output only. The list of emoji reaction summaries on the message.
    { # The number of people who reacted to a message with a specific emoji.
      "emoji": { # An emoji that is used as a reaction to a message. # Emoji associated with the reactions.
        "customEmoji": { # Represents a custom emoji. # Output only. A custom emoji.
          "uid": "A String", # Unique key for the custom emoji resource.
        },
        "unicode": "A String", # A basic emoji represented by a unicode string.
      },
      "reactionCount": 42, # The total number of reactions using the associated emoji.
    },
  ],
  "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards can't be displayed—for example, mobile notifications.
  "lastUpdateTime": "A String", # Output only. The time at which the message was last edited by a user. If the message has never been edited, this field is empty.
  "matchedUrl": { # A matched URL in a Chat message. Chat apps can preview matched URLs. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links). # Output only. A URL in `spaces.messages.text` that matches a link preview pattern. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links).
    "url": "A String", # Output only. The URL that was matched.
  },
  "name": "A String", # Resource name in the form `spaces/*/messages/*`. Example: `spaces/AAAAAAAAAAA/messages/BBBBBBBBBBB.BBBBBBBBBBB`
  "quotedMessageMetadata": { # Information about a quoted message. # Output only. Information about a message that's quoted by a Google Chat user in a space. Google Chat users can quote a message to reply to it.
    "lastUpdateTime": "A String", # Output only. The timestamp when the quoted message was created or when the quoted message was last updated.
    "name": "A String", # Output only. Resource name of the quoted message. Format: `spaces/{space}/messages/{message}`
  },
  "sender": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # Output only. The user who created the message. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [user](https://developers.google.com/chat/api/reference/rest/v1/User) `name` and `type`.
    "displayName": "A String", # Output only. The user's display name.
    "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
    "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
    "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
    "type": "A String", # User type.
  },
  "slashCommand": { # A [slash command](https://developers.google.com/chat/how-tos/slash-commands) in Google Chat. # Output only. Slash command information, if applicable.
    "commandId": "A String", # The ID of the slash command invoked.
  },
  "space": { # A space in Google Chat. Spaces are conversations between two or more users or 1:1 messages between a user and a Chat app. # If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [space](https://developers.google.com/chat/api/reference/rest/v1/spaces) `name`.
    "adminInstalled": True or False, # Output only. Whether the Chat app was installed by a Google Workspace administrator. Administrators can install a Chat app for their domain, organizational unit, or a group of users. Administrators can only install Chat apps for direct messaging between users and the app. To support admin install, your app must feature direct messaging.
    "displayName": "A String", # The space's display name. Required when [creating a space](https://developers.google.com/chat/api/reference/rest/v1/spaces/create). If you receive the error message `ALREADY_EXISTS` when creating a space or updating the `displayName`, try a different `displayName`. An existing space within the Google Workspace organization might already use this display name. For direct messages, this field might be empty. Supports up to 128 characters.
    "externalUserAllowed": True or False, # Immutable. Whether this space permits any Google Chat user as a member. Input when creating a space in a Google Workspace organization. For Google Chat users that use a Google Account, omit this field when creating a space (By default, the space permits any Google Chat user). For existing spaces, this field is output only.
    "name": "A String", # Resource name of the space. Format: `spaces/{space}`
    "singleUserBotDm": True or False, # Optional. Whether the space is a DM between a Chat app and a single human.
    "spaceDetails": { # Details about the space including description and rules. # Details about the space including description and rules.
      "description": "A String", # Optional. A description of the space. For example, describe the space's discussion topic, functional purpose, or participants. Supports up to 150 characters.
      "guidelines": "A String", # Optional. The space's rules, expectations, and etiquette. Supports up to 5,000 characters.
    },
    "spaceHistoryState": "A String", # The message history state for messages and threads in this space.
    "spaceThreadingState": "A String", # Output only. The threading state in the Chat space.
    "spaceType": "A String", # The type of space. Required when creating a space or updating the space type of a space. Output only for other usage.
    "threaded": True or False, # Output only. Deprecated: Use `spaceThreadingState` instead. Whether messages are threaded in this space.
    "type": "A String", # Output only. Deprecated: Use `space_type` instead. The type of a space.
  },
  "text": "A String", # Plain-text body of the message. The first link to an image, video, or web page generates a [preview chip](https://developers.google.com/chat/how-tos/preview-links). You can also [@mention a Google Chat user](https://developers.google.com/chat/api/guides/message-formats/text#messages-@mention), or everyone in the space. To learn about creating text messages, see [Create a text message](https://developers.google.com/chat/api/guides/message-formats/text).
  "thread": { # A thread in a Google Chat space. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/v1/messages/create#create-message-thread). If you specify a thread when creating a message, you can set the [`messageReplyOption`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages/create#messagereplyoption) field to determine what happens if no matching thread is found. # The thread the message belongs to. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/crudl/messages#start_or_reply_to_a_message_thread).
    "name": "A String", # Output only. Resource name of the thread. Example: `spaces/{space}/threads/{thread}`
    "threadKey": "A String", # Optional. Input for creating or updating a thread. Otherwise, output only. ID for the thread. Supports up to 4000 characters. This ID is unique to the Chat app that sets it. For example, if multiple Chat apps create a message using the same thread key, the messages are posted in different threads. To reply in a thread created by a person or another Chat app, specify the thread `name` field instead.
  },
  "threadReply": True or False, # Output only. When `true`, the message is a response in a reply thread. When `false`, the message is visible in the space's top-level conversation as either the first message of a thread or a message with no threaded replies. If the space doesn't support reply in threads, this field is always `false`.
}
list(parent, filter=None, orderBy=None, pageSize=None, pageToken=None, showDeleted=None, x__xgafv=None)
Lists messages in a space that the caller is a member of, including messages from blocked members and spaces. For an example, see [List messages](/chat/api/guides/v1/messages/list). Requires [user authentication](https://developers.google.com/chat/api/guides/auth/users).

Args:
  parent: string, Required. The resource name of the space to list messages from. Format: `spaces/{space}` (required)
  filter: string, A query filter. You can filter messages by date (`create_time`) and thread (`thread.name`). To filter messages by the date they were created, specify the `create_time` with a timestamp in [RFC-3339](https://www.rfc-editor.org/rfc/rfc3339) format and double quotation marks. For example, `"2023-04-21T11:30:00-04:00"`. You can use the greater than operator `>` to list messages that were created after a timestamp, or the less than operator `<` to list messages that were created before a timestamp. To filter messages within a time interval, use the `AND` operator between two timestamps. To filter by thread, specify the `thread.name`, formatted as `spaces/{space}/threads/{thread}`. You can only specify one `thread.name` per query. To filter by both thread and date, use the `AND` operator in your query. For example, the following queries are valid: ``` create_time > "2012-04-21T11:30:00-04:00" create_time > "2012-04-21T11:30:00-04:00" AND thread.name = spaces/AAAAAAAAAAA/threads/123 create_time > "2012-04-21T11:30:00+00:00" AND create_time < "2013-01-01T00:00:00+00:00" AND thread.name = spaces/AAAAAAAAAAA/threads/123 thread.name = spaces/AAAAAAAAAAA/threads/123 ``` Invalid queries are rejected by the server with an `INVALID_ARGUMENT` error.
  orderBy: string, Optional, if resuming from a previous query. How the list of messages is ordered. Specify a value to order by an ordering operation. Valid ordering operation values are as follows: - `ASC` for ascending. - `DESC` for descending. The default ordering is `create_time ASC`.
  pageSize: integer, The maximum number of messages returned. The service might return fewer messages than this value. If unspecified, at most 25 are returned. The maximum value is 1,000. If you use a value more than 1,000, it's automatically changed to 1,000. Negative values return an `INVALID_ARGUMENT` error.
  pageToken: string, Optional, if resuming from a previous query. A page token received from a previous list messages call. Provide this parameter to retrieve the subsequent page. When paginating, all other parameters provided should match the call that provided the page token. Passing different values to the other parameters might lead to unexpected results.
  showDeleted: boolean, Whether to include deleted messages. Deleted messages include deleted time and metadata about their deletion, but message content is unavailable.
  x__xgafv: string, V1 error format.
    Allowed values
      1 - v1 error format
      2 - v2 error format

Returns:
  An object of the form:

    {
  "messages": [ # List of messages.
    { # A message in a Google Chat space.
      "actionResponse": { # Parameters that a Chat app can use to configure how its response is posted. # Input only. Parameters that a Chat app can use to configure how its response is posted.
        "dialogAction": { # Contains a [dialog](https://developers.google.com/chat/how-tos/dialogs) and request status code. # Input only. A response to an event related to a [dialog](https://developers.google.com/chat/how-tos/dialogs). Must be accompanied by `ResponseType.Dialog`.
          "actionStatus": { # Represents the status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). # Input only. Status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). Displays a status and message to users, if necessary. For example, in case of an error or success.
            "statusCode": "A String", # The status code.
            "userFacingMessage": "A String", # The message to send users about the status of their request. If unset, a generic message based on the `status_code` is sent.
          },
          "dialog": { # Wrapper around the card body of the dialog. # Input only. [Dialog](https://developers.google.com/chat/how-tos/dialogs) for the request.
            "body": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # Input only. Body of the dialog, which is rendered in a modal. Google Chat apps don't support the following card entities: `DateTimePicker`, `OnChangeAction`.
              "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
                { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
                  "actionLabel": "A String", # The label that displays as the action menu item.
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                },
              ],
              "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
              "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
                "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
                  "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                  "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                    "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                    "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                    "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                    "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                  },
                  "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "text": "A String", # The text displayed inside the button.
                },
                "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
                  "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                  "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                    "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                    "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                    "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                    "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                  },
                  "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "text": "A String", # The text displayed inside the button.
                },
              },
              "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
                "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
                "imageType": "A String", # The shape used to crop the image.
                "imageUrl": "A String", # The HTTPS URL of the image in the card header.
                "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
                "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
              },
              "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
              "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
                "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
                "imageType": "A String", # The shape used to crop the image.
                "imageUrl": "A String", # The HTTPS URL of the image in the card header.
                "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
                "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
              },
              "sectionDividerStyle": "A String", # The divider style between sections.
              "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
                { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
                  "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
                  "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                  "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
                  "widgets": [ # All the widgets in the section. Must contain at least one widget.
                    { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                      "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                        "buttons": [ # An array of buttons.
                          { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                            },
                            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                            "text": "A String", # The text displayed inside the button.
                          },
                        ],
                      },
                      "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                        "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                          { # A column.
                            "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                            "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                            "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                            "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                              { # The supported widgets that you can include in a column.
                                "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                                  "buttons": [ # An array of buttons.
                                    { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                      },
                                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                      },
                                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                          "parameters": [ # List of action parameters.
                                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                              "key": "A String", # The name of the parameter for the action script.
                                              "value": "A String", # The value of the parameter.
                                            },
                                          ],
                                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                        },
                                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                          "parameters": [ # List of action parameters.
                                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                              "key": "A String", # The name of the parameter for the action script.
                                              "value": "A String", # The value of the parameter.
                                            },
                                          ],
                                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                        },
                                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                          "url": "A String", # The URL to open.
                                        },
                                      },
                                      "text": "A String", # The text displayed inside the button.
                                    },
                                  ],
                                },
                                "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                                  "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                                  "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                                  "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                                  "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                                },
                                "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                                  "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                                  "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                                    "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                    "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                    },
                                    "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                    },
                                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                        "parameters": [ # List of action parameters.
                                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                            "key": "A String", # The name of the parameter for the action script.
                                            "value": "A String", # The value of the parameter.
                                          },
                                        ],
                                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                      },
                                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                        "parameters": [ # List of action parameters.
                                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                            "key": "A String", # The name of the parameter for the action script.
                                            "value": "A String", # The value of the parameter.
                                          },
                                        ],
                                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                      },
                                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                        "url": "A String", # The URL to open.
                                      },
                                    },
                                    "text": "A String", # The text displayed inside the button.
                                  },
                                  "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                  },
                                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                  },
                                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                      "url": "A String", # The URL to open.
                                    },
                                  },
                                  "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                  },
                                  "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                                    "controlType": "A String", # How the switch appears in the user interface.
                                    "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "selected": True or False, # When `true`, the switch is selected.
                                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                  },
                                  "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                                  "topLabel": "A String", # The text that appears above `text`. Always truncates.
                                  "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                                },
                                "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                                  "altText": "A String", # The alternative text of this image that's used for accessibility.
                                  "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                      "url": "A String", # The URL to open.
                                    },
                                  },
                                },
                                "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                                  "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                                    { # An item that users can select in a selection input, such as a checkbox or switch.
                                      "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                      "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                      "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                      "text": "A String", # The text that identifies or describes the item to users.
                                      "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                    },
                                  ],
                                  "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                                  "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                                    "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                      "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                        "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                          "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                        },
                                      },
                                    },
                                  },
                                  "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                                },
                                "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                                  "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                                  "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                                    "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                      { # One suggested value that users can enter in a text input field.
                                        "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                      },
                                    ],
                                  },
                                  "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                                  "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                                  "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                },
                                "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                                  "text": "A String", # The text that's shown in the widget.
                                },
                              },
                            ],
                          },
                        ],
                      },
                      "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                        "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                        "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                        "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                        "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                        "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                      },
                      "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                        "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                        "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                          "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                          "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                            "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                            "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                            "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                            "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                          },
                          "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                          "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                            "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                            "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                            "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                            "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                          },
                          "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                            "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                              "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                              "openAs": "A String", # How to open a link. Not supported by Chat apps.
                              "url": "A String", # The URL to open.
                            },
                          },
                          "text": "A String", # The text displayed inside the button.
                        },
                        "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                          "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                          "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                          "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                          "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                        },
                        "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                          "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                          "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                          "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                          "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                        },
                        "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                          "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                            "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                            "openAs": "A String", # How to open a link. Not supported by Chat apps.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                          "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                          "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                          "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                          "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                        },
                        "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                          "controlType": "A String", # How the switch appears in the user interface.
                          "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                          "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "selected": True or False, # When `true`, the switch is selected.
                          "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                        },
                        "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                        "topLabel": "A String", # The text that appears above `text`. Always truncates.
                        "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                      },
                      "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                      },
                      "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                        "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                          "cornerRadius": 42, # The corner radius for the border.
                          "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                            "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                            "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                            "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                            "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                          },
                          "type": "A String", # The border type.
                        },
                        "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                        "items": [ # The items to display in the grid.
                          { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                            "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                            "image": { # Represents an image. # The image that displays in the grid item.
                              "altText": "A String", # The accessibility label for the image.
                              "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                                "cornerRadius": 42, # The corner radius for the border.
                                "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "type": "A String", # The border type.
                              },
                              "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                                "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                                "type": "A String", # The crop type.
                              },
                              "imageUri": "A String", # The image URL.
                            },
                            "layout": "A String", # The layout to use for the grid item.
                            "subtitle": "A String", # The grid item's subtitle.
                            "title": "A String", # The grid item's title.
                          },
                        ],
                        "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                          "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                            "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                            "openAs": "A String", # How to open a link. Not supported by Chat apps.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "title": "A String", # The text that displays in the grid header.
                      },
                      "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                      "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                        "altText": "A String", # The alternative text of this image that's used for accessibility.
                        "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                        "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                          "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                            "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                            "openAs": "A String", # How to open a link. Not supported by Chat apps.
                            "url": "A String", # The URL to open.
                          },
                        },
                      },
                      "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                        "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                          { # An item that users can select in a selection input, such as a checkbox or switch.
                            "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                            "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                            "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                            "text": "A String", # The text that identifies or describes the item to users.
                            "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                          },
                        ],
                        "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                        "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                        "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                        "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                        "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                          "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                          "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                            "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                              "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                              },
                            },
                          },
                        },
                        "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                      },
                      "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                        "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                        "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                          "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                            { # One suggested value that users can enter in a text input field.
                              "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                            },
                          ],
                        },
                        "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                        "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                        "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                        "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      },
                      "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                        "text": "A String", # The text that's shown in the widget.
                      },
                    },
                  ],
                },
              ],
            },
          },
        },
        "type": "A String", # Input only. The type of Chat app response.
        "url": "A String", # Input only. URL for users to authenticate or configure. (Only for `REQUEST_CONFIG` response types.)
      },
      "annotations": [ # Output only. Annotations associated with the `text` in this message.
        { # Output only. Annotations associated with the plain-text body of the message. To add basic formatting to a text message, see [Format text messages](https://developers.google.com/chat/api/guides/message-formats/text#format-texts). Example plain-text message body: ``` Hello @FooBot how are you!" ``` The corresponding annotations metadata: ``` "annotations":[{ "type":"USER_MENTION", "startIndex":6, "length":7, "userMention": { "user": { "name":"users/{user}", "displayName":"FooBot", "avatarUrl":"https://goo.gl/aeDtrS", "type":"BOT" }, "type":"MENTION" } }] ```
          "length": 42, # Length of the substring in the plain-text message body this annotation corresponds to.
          "slashCommand": { # Annotation metadata for slash commands (/). # The metadata for a slash command.
            "bot": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The Chat app whose command was invoked.
              "displayName": "A String", # Output only. The user's display name.
              "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
              "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
              "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
              "type": "A String", # User type.
            },
            "commandId": "A String", # The command ID of the invoked slash command.
            "commandName": "A String", # The name of the invoked slash command.
            "triggersDialog": True or False, # Indicates whether the slash command is for a dialog.
            "type": "A String", # The type of slash command.
          },
          "startIndex": 42, # Start index (0-based, inclusive) in the plain-text message body this annotation corresponds to.
          "type": "A String", # The type of this annotation.
          "userMention": { # Annotation metadata for user mentions (@). # The metadata of user mention.
            "type": "A String", # The type of user mention.
            "user": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The user mentioned.
              "displayName": "A String", # Output only. The user's display name.
              "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
              "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
              "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
              "type": "A String", # User type.
            },
          },
        },
      ],
      "argumentText": "A String", # Output only. Plain-text body of the message with all Chat app mentions stripped out.
      "attachedGifs": [ # Output only. GIF images that are attached to the message.
        { # A GIF image that's specified by a URL.
          "uri": "A String", # Output only. The URL that hosts the GIF image.
        },
      ],
      "attachment": [ # User-uploaded attachment.
        { # An attachment in Google Chat.
          "attachmentDataRef": { # A reference to the attachment data. This field is used with the media API to download the attachment data.
            "attachmentUploadToken": "A String", # Opaque token containing a reference to an uploaded attachment. Treated by clients as an opaque string and used to create or update Chat messages with attachments.
            "resourceName": "A String", # The resource name of the attachment data. This field is used with the media API to download the attachment data.
          },
          "contentName": "A String", # Output only. The original file name for the content, not the full path.
          "contentType": "A String", # Output only. The content type (MIME type) of the file.
          "downloadUri": "A String", # Output only. The download URL which should be used to allow a human user to download the attachment. Chat apps shouldn't use this URL to download attachment content.
          "driveDataRef": { # A reference to the data of a drive attachment. # Output only. A reference to the Google Drive attachment. This field is used with the Google Drive API.
            "driveFileId": "A String", # The ID for the drive file. Use with the Drive API.
          },
          "name": "A String", # Resource name of the attachment, in the form `spaces/*/messages/*/attachments/*`.
          "source": "A String", # Output only. The source of the attachment.
          "thumbnailUri": "A String", # Output only. The thumbnail URL which should be used to preview the attachment to a human user. Chat apps shouldn't use this URL to download attachment content.
        },
      ],
      "cards": [ # Deprecated: Use `cards_v2` instead. Rich, formatted, and interactive cards that you can use to display UI elements such as: formatted texts, buttons, and clickable images. Cards are normally displayed below the plain-text body of the message. `cards` and `cards_v2` can have a maximum size of 32 KB.
        { # A card is a UI element that can contain UI widgets such as text and images.
          "cardActions": [ # The actions of this card.
            { # A card action is the action associated with the card. For an invoice card, a typical action would be: delete invoice, email invoice or open the invoice in browser. Not supported by Google Chat apps.
              "actionLabel": "A String", # The label used to be displayed in the action menu item.
              "onClick": { # An `onclick` action (for example, open a link). # The onclick action for this action item.
                "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                  "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                },
                "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                  "url": "A String", # The URL to open.
                },
              },
            },
          ],
          "header": { # The header of the card. A header usually contains a title and an image.
            "imageStyle": "A String", # The image's type (for example, square border or circular border).
            "imageUrl": "A String", # The URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header.
            "title": "A String", # The title must be specified. The header has a fixed height: if both a title and subtitle is specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "name": "A String", # Name of the card.
          "sections": [ # Sections are separated by a line divider.
            { # A section contains a collection of widgets that are rendered (vertically) in the order that they are specified. Across all platforms, cards have a narrow fixed width, so there's currently no need for layout properties (for example, float).
              "header": "A String", # The header of the section. Formatted text is supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              "widgets": [ # A section must contain at least one widget.
                { # A widget is a UI element that presents text and images.
                  "buttons": [ # A list of buttons. Buttons is also `oneof data` and only one of these fields should be set.
                    { # A button. Can be a text button or an image button.
                      "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                        "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                        "iconUrl": "A String", # The icon specified by a URL.
                        "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                        "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                          "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                            "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                          },
                          "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                            "url": "A String", # The URL to open.
                          },
                        },
                      },
                      "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                        "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                          "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                            "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                          },
                          "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "text": "A String", # The text of the button.
                      },
                    },
                  ],
                  "image": { # An image that's specified by a URL and can have an `onclick` action. # Display an image in this widget.
                    "aspectRatio": 3.14, # The aspect ratio of this image (width and height). This field lets you reserve the right height for the image while waiting for it to load. It's not meant to override the built-in aspect ratio of the image. If unset, the server fills it by prefetching the image.
                    "imageUrl": "A String", # The URL of the image.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "keyValue": { # A UI element contains a key (label) and a value (content). This element can also contain some actions such as `onclick` button. # Display a key value item in this widget.
                    "bottomLabel": "A String", # The text of the bottom label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                    "button": { # A button. Can be a text button or an image button. # A button that can be clicked to trigger an action.
                      "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                        "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                        "iconUrl": "A String", # The icon specified by a URL.
                        "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                        "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                          "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                            "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                          },
                          "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                            "url": "A String", # The URL to open.
                          },
                        },
                      },
                      "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                        "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                          "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                            "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                          },
                          "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "text": "A String", # The text of the button.
                      },
                    },
                    "content": "A String", # The text of the content. Formatted text supported and always required. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                    "contentMultiline": True or False, # If the content should be multiline.
                    "icon": "A String", # An enum value that's replaced by the Chat API with the corresponding icon image.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action. Only the top label, bottom label, and content region are clickable.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "topLabel": "A String", # The text of the top label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                  },
                  "textParagraph": { # A paragraph of text. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Display a text paragraph in this widget.
                    "text": "A String",
                  },
                },
              ],
            },
          ],
        },
      ],
      "cardsV2": [ # An array of [cards](https://developers.google.com/chat/api/reference/rest/v1/cards). Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the messages can't contain cards. To learn about cards and how to create them, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui).
        { # A [card](https://developers.google.com/chat/api/reference/rest/v1/cards) in a Google Chat message. Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the message can't contain cards.
          "card": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # A card. Maximum size is 32 KB.
            "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
              { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
                "actionLabel": "A String", # The label that displays as the action menu item.
                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                    "url": "A String", # The URL to open.
                  },
                },
              },
            ],
            "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
            "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
              "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                },
                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                },
                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                    "url": "A String", # The URL to open.
                  },
                },
                "text": "A String", # The text displayed inside the button.
              },
              "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                },
                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                },
                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                    "url": "A String", # The URL to open.
                  },
                },
                "text": "A String", # The text displayed inside the button.
              },
            },
            "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
              "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
              "imageType": "A String", # The shape used to crop the image.
              "imageUrl": "A String", # The HTTPS URL of the image in the card header.
              "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
              "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
            },
            "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
            "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
              "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
              "imageType": "A String", # The shape used to crop the image.
              "imageUrl": "A String", # The HTTPS URL of the image in the card header.
              "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
              "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
            },
            "sectionDividerStyle": "A String", # The divider style between sections.
            "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
              { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
                "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
                "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
                "widgets": [ # All the widgets in the section. Must contain at least one widget.
                  { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                    "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                      "buttons": [ # An array of buttons.
                        { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                          "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                          "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                            "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                            "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                            "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                            "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                          },
                          "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                          "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                            "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                            "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                            "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                            "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                          },
                          "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                            "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                              "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                              "openAs": "A String", # How to open a link. Not supported by Chat apps.
                              "url": "A String", # The URL to open.
                            },
                          },
                          "text": "A String", # The text displayed inside the button.
                        },
                      ],
                    },
                    "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                      "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                        { # A column.
                          "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                          "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                          "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                          "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                            { # The supported widgets that you can include in a column.
                              "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                                "buttons": [ # An array of buttons.
                                  { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                    "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                    "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                    },
                                    "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                    },
                                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                        "parameters": [ # List of action parameters.
                                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                            "key": "A String", # The name of the parameter for the action script.
                                            "value": "A String", # The value of the parameter.
                                          },
                                        ],
                                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                      },
                                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                        "parameters": [ # List of action parameters.
                                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                            "key": "A String", # The name of the parameter for the action script.
                                            "value": "A String", # The value of the parameter.
                                          },
                                        ],
                                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                      },
                                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                        "url": "A String", # The URL to open.
                                      },
                                    },
                                    "text": "A String", # The text displayed inside the button.
                                  },
                                ],
                              },
                              "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                                "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                                "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                                "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                                "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                              },
                              "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                                "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                                "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                                  "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                  "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                    "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                    "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                    "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                    "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                  },
                                  "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                  },
                                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                      "url": "A String", # The URL to open.
                                    },
                                  },
                                  "text": "A String", # The text displayed inside the button.
                                },
                                "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                                  "controlType": "A String", # How the switch appears in the user interface.
                                  "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "selected": True or False, # When `true`, the switch is selected.
                                  "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                },
                                "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                                "topLabel": "A String", # The text that appears above `text`. Always truncates.
                                "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                              },
                              "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                                "altText": "A String", # The alternative text of this image that's used for accessibility.
                                "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                              },
                              "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                                "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                                  { # An item that users can select in a selection input, such as a checkbox or switch.
                                    "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                    "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "text": "A String", # The text that identifies or describes the item to users.
                                    "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                  },
                                ],
                                "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                                "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                                "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                                "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                                  "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                      "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                        "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                      },
                                    },
                                  },
                                },
                                "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                              },
                              "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                                "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                                "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                                  "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                    { # One suggested value that users can enter in a text input field.
                                      "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                    },
                                  ],
                                },
                                "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                                "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                                "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                              "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                                "text": "A String", # The text that's shown in the widget.
                              },
                            },
                          ],
                        },
                      ],
                    },
                    "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                      "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                      "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                      "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                      "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                    },
                    "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                      "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                      "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                        "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                        "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                          "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                          "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                          "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                          "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                        },
                        "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                        "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                          "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                          "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                          "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                          "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                        },
                        "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                          "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                            "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                            "openAs": "A String", # How to open a link. Not supported by Chat apps.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "text": "A String", # The text displayed inside the button.
                      },
                      "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                        "controlType": "A String", # How the switch appears in the user interface.
                        "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                        "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "selected": True or False, # When `true`, the switch is selected.
                        "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      },
                      "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                      "topLabel": "A String", # The text that appears above `text`. Always truncates.
                      "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                    },
                    "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                    },
                    "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                      "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                        "cornerRadius": 42, # The corner radius for the border.
                        "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                          "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                          "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                          "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                          "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                        },
                        "type": "A String", # The border type.
                      },
                      "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                      "items": [ # The items to display in the grid.
                        { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                          "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                          "image": { # Represents an image. # The image that displays in the grid item.
                            "altText": "A String", # The accessibility label for the image.
                            "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                              "cornerRadius": 42, # The corner radius for the border.
                              "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                              },
                              "type": "A String", # The border type.
                            },
                            "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                              "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                              "type": "A String", # The crop type.
                            },
                            "imageUri": "A String", # The image URL.
                          },
                          "layout": "A String", # The layout to use for the grid item.
                          "subtitle": "A String", # The grid item's subtitle.
                          "title": "A String", # The grid item's title.
                        },
                      ],
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "title": "A String", # The text that displays in the grid header.
                    },
                    "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                    "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                      "altText": "A String", # The alternative text of this image that's used for accessibility.
                      "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                    },
                    "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                      "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                        { # An item that users can select in a selection input, such as a checkbox or switch.
                          "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                          "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                          "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                          "text": "A String", # The text that identifies or describes the item to users.
                          "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                        },
                      ],
                      "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                      "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                      "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                      "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                        "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                        "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                          "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                            "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                              "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                            },
                          },
                        },
                      },
                      "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                    },
                    "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                      "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                      "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                        "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                          { # One suggested value that users can enter in a text input field.
                            "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                          },
                        ],
                      },
                      "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                      "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                      "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                    "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                      "text": "A String", # The text that's shown in the widget.
                    },
                  },
                ],
              },
            ],
          },
          "cardId": "A String", # Required if the message contains multiple cards. A unique identifier for a card in a message.
        },
      ],
      "clientAssignedMessageId": "A String", # A custom name for a Chat message assigned at creation. Must start with `client-` and contain only lowercase letters, numbers, and hyphens up to 63 characters in length. Specify this field to get, update, or delete the message with the specified value. Assigning a custom name lets a Chat app recall the message without saving the message `name` from the [response body](/chat/api/reference/rest/v1/spaces.messages/get#response-body) returned when creating the message. Assigning a custom name doesn't replace the generated `name` field, the message's resource name. Instead, it sets the custom name as the `clientAssignedMessageId` field, which you can reference while processing later operations, like updating or deleting the message. For example usage, see [Name a created message](https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message).
      "createTime": "A String", # For spaces created in Chat, the time at which the message was created. This field is output only, except when used in imported spaces. [Developer Preview](https://developers.google.com/workspace/preview): For imported spaces, set this field to the historical timestamp at which the message was created in the source in order to preserve the original creation time.
      "deleteTime": "A String", # Output only. The time at which the message was deleted in Google Chat. If the message is never deleted, this field is empty.
      "deletionMetadata": { # Information about a deleted message. A message is deleted when `delete_time` is set. # Output only. Information about a deleted message. A message is deleted when `delete_time` is set.
        "deletionType": "A String", # Indicates who deleted the message.
      },
      "emojiReactionSummaries": [ # Output only. The list of emoji reaction summaries on the message.
        { # The number of people who reacted to a message with a specific emoji.
          "emoji": { # An emoji that is used as a reaction to a message. # Emoji associated with the reactions.
            "customEmoji": { # Represents a custom emoji. # Output only. A custom emoji.
              "uid": "A String", # Unique key for the custom emoji resource.
            },
            "unicode": "A String", # A basic emoji represented by a unicode string.
          },
          "reactionCount": 42, # The total number of reactions using the associated emoji.
        },
      ],
      "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards can't be displayed—for example, mobile notifications.
      "lastUpdateTime": "A String", # Output only. The time at which the message was last edited by a user. If the message has never been edited, this field is empty.
      "matchedUrl": { # A matched URL in a Chat message. Chat apps can preview matched URLs. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links). # Output only. A URL in `spaces.messages.text` that matches a link preview pattern. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links).
        "url": "A String", # Output only. The URL that was matched.
      },
      "name": "A String", # Resource name in the form `spaces/*/messages/*`. Example: `spaces/AAAAAAAAAAA/messages/BBBBBBBBBBB.BBBBBBBBBBB`
      "quotedMessageMetadata": { # Information about a quoted message. # Output only. Information about a message that's quoted by a Google Chat user in a space. Google Chat users can quote a message to reply to it.
        "lastUpdateTime": "A String", # Output only. The timestamp when the quoted message was created or when the quoted message was last updated.
        "name": "A String", # Output only. Resource name of the quoted message. Format: `spaces/{space}/messages/{message}`
      },
      "sender": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # Output only. The user who created the message. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [user](https://developers.google.com/chat/api/reference/rest/v1/User) `name` and `type`.
        "displayName": "A String", # Output only. The user's display name.
        "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
        "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
        "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
        "type": "A String", # User type.
      },
      "slashCommand": { # A [slash command](https://developers.google.com/chat/how-tos/slash-commands) in Google Chat. # Output only. Slash command information, if applicable.
        "commandId": "A String", # The ID of the slash command invoked.
      },
      "space": { # A space in Google Chat. Spaces are conversations between two or more users or 1:1 messages between a user and a Chat app. # If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [space](https://developers.google.com/chat/api/reference/rest/v1/spaces) `name`.
        "adminInstalled": True or False, # Output only. Whether the Chat app was installed by a Google Workspace administrator. Administrators can install a Chat app for their domain, organizational unit, or a group of users. Administrators can only install Chat apps for direct messaging between users and the app. To support admin install, your app must feature direct messaging.
        "displayName": "A String", # The space's display name. Required when [creating a space](https://developers.google.com/chat/api/reference/rest/v1/spaces/create). If you receive the error message `ALREADY_EXISTS` when creating a space or updating the `displayName`, try a different `displayName`. An existing space within the Google Workspace organization might already use this display name. For direct messages, this field might be empty. Supports up to 128 characters.
        "externalUserAllowed": True or False, # Immutable. Whether this space permits any Google Chat user as a member. Input when creating a space in a Google Workspace organization. For Google Chat users that use a Google Account, omit this field when creating a space (By default, the space permits any Google Chat user). For existing spaces, this field is output only.
        "name": "A String", # Resource name of the space. Format: `spaces/{space}`
        "singleUserBotDm": True or False, # Optional. Whether the space is a DM between a Chat app and a single human.
        "spaceDetails": { # Details about the space including description and rules. # Details about the space including description and rules.
          "description": "A String", # Optional. A description of the space. For example, describe the space's discussion topic, functional purpose, or participants. Supports up to 150 characters.
          "guidelines": "A String", # Optional. The space's rules, expectations, and etiquette. Supports up to 5,000 characters.
        },
        "spaceHistoryState": "A String", # The message history state for messages and threads in this space.
        "spaceThreadingState": "A String", # Output only. The threading state in the Chat space.
        "spaceType": "A String", # The type of space. Required when creating a space or updating the space type of a space. Output only for other usage.
        "threaded": True or False, # Output only. Deprecated: Use `spaceThreadingState` instead. Whether messages are threaded in this space.
        "type": "A String", # Output only. Deprecated: Use `space_type` instead. The type of a space.
      },
      "text": "A String", # Plain-text body of the message. The first link to an image, video, or web page generates a [preview chip](https://developers.google.com/chat/how-tos/preview-links). You can also [@mention a Google Chat user](https://developers.google.com/chat/api/guides/message-formats/text#messages-@mention), or everyone in the space. To learn about creating text messages, see [Create a text message](https://developers.google.com/chat/api/guides/message-formats/text).
      "thread": { # A thread in a Google Chat space. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/v1/messages/create#create-message-thread). If you specify a thread when creating a message, you can set the [`messageReplyOption`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages/create#messagereplyoption) field to determine what happens if no matching thread is found. # The thread the message belongs to. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/crudl/messages#start_or_reply_to_a_message_thread).
        "name": "A String", # Output only. Resource name of the thread. Example: `spaces/{space}/threads/{thread}`
        "threadKey": "A String", # Optional. Input for creating or updating a thread. Otherwise, output only. ID for the thread. Supports up to 4000 characters. This ID is unique to the Chat app that sets it. For example, if multiple Chat apps create a message using the same thread key, the messages are posted in different threads. To reply in a thread created by a person or another Chat app, specify the thread `name` field instead.
      },
      "threadReply": True or False, # Output only. When `true`, the message is a response in a reply thread. When `false`, the message is visible in the space's top-level conversation as either the first message of a thread or a message with no threaded replies. If the space doesn't support reply in threads, this field is always `false`.
    },
  ],
  "nextPageToken": "A String", # You can send a token as `pageToken` to retrieve the next page of results. If empty, there are no subsequent pages.
}
list_next()
Retrieves the next page of results.

        Args:
          previous_request: The request for the previous page. (required)
          previous_response: The response from the request for the previous page. (required)

        Returns:
          A request object that you can call 'execute()' on to request the next
          page. Returns None if there are no more items in the collection.
        
patch(name, allowMissing=None, body=None, updateMask=None, x__xgafv=None)
Updates a message. There's a difference between the `patch` and `update` methods. The `patch` method uses a `patch` request while the `update` method uses a `put` request. We recommend using the `patch` method. For an example, see [Update a message](https://developers.google.com/chat/api/guides/v1/messages/update). Requires [authentication](https://developers.google.com/chat/api/guides/auth). Fully supports [service account authentication](https://developers.google.com/chat/api/guides/auth/service-accounts) and [user authentication](https://developers.google.com/chat/api/guides/auth/users). [User authentication](https://developers.google.com/chat/api/guides/auth/users). Requests authenticated with service accounts can only update messages created by the calling Chat app.

Args:
  name: string, Resource name in the form `spaces/*/messages/*`. Example: `spaces/AAAAAAAAAAA/messages/BBBBBBBBBBB.BBBBBBBBBBB` (required)
  body: object, The request body.
    The object takes the form of:

{ # A message in a Google Chat space.
  "actionResponse": { # Parameters that a Chat app can use to configure how its response is posted. # Input only. Parameters that a Chat app can use to configure how its response is posted.
    "dialogAction": { # Contains a [dialog](https://developers.google.com/chat/how-tos/dialogs) and request status code. # Input only. A response to an event related to a [dialog](https://developers.google.com/chat/how-tos/dialogs). Must be accompanied by `ResponseType.Dialog`.
      "actionStatus": { # Represents the status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). # Input only. Status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). Displays a status and message to users, if necessary. For example, in case of an error or success.
        "statusCode": "A String", # The status code.
        "userFacingMessage": "A String", # The message to send users about the status of their request. If unset, a generic message based on the `status_code` is sent.
      },
      "dialog": { # Wrapper around the card body of the dialog. # Input only. [Dialog](https://developers.google.com/chat/how-tos/dialogs) for the request.
        "body": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # Input only. Body of the dialog, which is rendered in a modal. Google Chat apps don't support the following card entities: `DateTimePicker`, `OnChangeAction`.
          "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
            { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
              "actionLabel": "A String", # The label that displays as the action menu item.
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
            },
          ],
          "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
          "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
            "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
            "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
          },
          "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
          "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "sectionDividerStyle": "A String", # The divider style between sections.
          "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
            { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
              "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
              "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
              "widgets": [ # All the widgets in the section. Must contain at least one widget.
                { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                  "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                    "buttons": [ # An array of buttons.
                      { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                        "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                        "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                          "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                          "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                          "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                          "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                        },
                        "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                        "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                          "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                          "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                          "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                          "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                        },
                        "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                          "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                            "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                            "openAs": "A String", # How to open a link. Not supported by Chat apps.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "text": "A String", # The text displayed inside the button.
                      },
                    ],
                  },
                  "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                    "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                      { # A column.
                        "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                        "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                        "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                        "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                          { # The supported widgets that you can include in a column.
                            "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                              "buttons": [ # An array of buttons.
                                { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                  "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                  "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                    "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                    "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                    "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                    "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                  },
                                  "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                  },
                                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                      "url": "A String", # The URL to open.
                                    },
                                  },
                                  "text": "A String", # The text displayed inside the button.
                                },
                              ],
                            },
                            "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                              "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                              "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                              "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                              "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                            },
                            "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                              "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                              "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                              "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                                "controlType": "A String", # How the switch appears in the user interface.
                                "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "selected": True or False, # When `true`, the switch is selected.
                                "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                              "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                              "topLabel": "A String", # The text that appears above `text`. Always truncates.
                              "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                            },
                            "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                              "altText": "A String", # The alternative text of this image that's used for accessibility.
                              "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                            },
                            "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                              "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                                { # An item that users can select in a selection input, such as a checkbox or switch.
                                  "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                  "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "text": "A String", # The text that identifies or describes the item to users.
                                  "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                },
                              ],
                              "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                              "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                              "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                              "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                                "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                                "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                      "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                    },
                                  },
                                },
                              },
                              "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                            },
                            "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                              "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                              "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                                "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                  { # One suggested value that users can enter in a text input field.
                                    "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                  },
                                ],
                              },
                              "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                              "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                              "text": "A String", # The text that's shown in the widget.
                            },
                          },
                        ],
                      },
                    ],
                  },
                  "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                    "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                    "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                    "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                    "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                  },
                  "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                    "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                    "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                    "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                      "controlType": "A String", # How the switch appears in the user interface.
                      "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "selected": True or False, # When `true`, the switch is selected.
                      "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                    "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                    "topLabel": "A String", # The text that appears above `text`. Always truncates.
                    "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                  },
                  "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                  },
                  "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                    "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                      "cornerRadius": 42, # The corner radius for the border.
                      "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "type": "A String", # The border type.
                    },
                    "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                    "items": [ # The items to display in the grid.
                      { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                        "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                        "image": { # Represents an image. # The image that displays in the grid item.
                          "altText": "A String", # The accessibility label for the image.
                          "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                            "cornerRadius": 42, # The corner radius for the border.
                            "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                            },
                            "type": "A String", # The border type.
                          },
                          "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                            "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                            "type": "A String", # The crop type.
                          },
                          "imageUri": "A String", # The image URL.
                        },
                        "layout": "A String", # The layout to use for the grid item.
                        "subtitle": "A String", # The grid item's subtitle.
                        "title": "A String", # The grid item's title.
                      },
                    ],
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "title": "A String", # The text that displays in the grid header.
                  },
                  "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                  "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                    "altText": "A String", # The alternative text of this image that's used for accessibility.
                    "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                    "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                      { # An item that users can select in a selection input, such as a checkbox or switch.
                        "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                        "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                        "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                        "text": "A String", # The text that identifies or describes the item to users.
                        "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      },
                    ],
                    "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                    "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                    "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                    "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                      "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                      "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                        "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                          "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                            "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                          },
                        },
                      },
                    },
                    "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                  },
                  "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                    "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                    "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                      "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                        { # One suggested value that users can enter in a text input field.
                          "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                        },
                      ],
                    },
                    "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                    "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                    "text": "A String", # The text that's shown in the widget.
                  },
                },
              ],
            },
          ],
        },
      },
    },
    "type": "A String", # Input only. The type of Chat app response.
    "url": "A String", # Input only. URL for users to authenticate or configure. (Only for `REQUEST_CONFIG` response types.)
  },
  "annotations": [ # Output only. Annotations associated with the `text` in this message.
    { # Output only. Annotations associated with the plain-text body of the message. To add basic formatting to a text message, see [Format text messages](https://developers.google.com/chat/api/guides/message-formats/text#format-texts). Example plain-text message body: ``` Hello @FooBot how are you!" ``` The corresponding annotations metadata: ``` "annotations":[{ "type":"USER_MENTION", "startIndex":6, "length":7, "userMention": { "user": { "name":"users/{user}", "displayName":"FooBot", "avatarUrl":"https://goo.gl/aeDtrS", "type":"BOT" }, "type":"MENTION" } }] ```
      "length": 42, # Length of the substring in the plain-text message body this annotation corresponds to.
      "slashCommand": { # Annotation metadata for slash commands (/). # The metadata for a slash command.
        "bot": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The Chat app whose command was invoked.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
        "commandId": "A String", # The command ID of the invoked slash command.
        "commandName": "A String", # The name of the invoked slash command.
        "triggersDialog": True or False, # Indicates whether the slash command is for a dialog.
        "type": "A String", # The type of slash command.
      },
      "startIndex": 42, # Start index (0-based, inclusive) in the plain-text message body this annotation corresponds to.
      "type": "A String", # The type of this annotation.
      "userMention": { # Annotation metadata for user mentions (@). # The metadata of user mention.
        "type": "A String", # The type of user mention.
        "user": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The user mentioned.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
      },
    },
  ],
  "argumentText": "A String", # Output only. Plain-text body of the message with all Chat app mentions stripped out.
  "attachedGifs": [ # Output only. GIF images that are attached to the message.
    { # A GIF image that's specified by a URL.
      "uri": "A String", # Output only. The URL that hosts the GIF image.
    },
  ],
  "attachment": [ # User-uploaded attachment.
    { # An attachment in Google Chat.
      "attachmentDataRef": { # A reference to the attachment data. This field is used with the media API to download the attachment data.
        "attachmentUploadToken": "A String", # Opaque token containing a reference to an uploaded attachment. Treated by clients as an opaque string and used to create or update Chat messages with attachments.
        "resourceName": "A String", # The resource name of the attachment data. This field is used with the media API to download the attachment data.
      },
      "contentName": "A String", # Output only. The original file name for the content, not the full path.
      "contentType": "A String", # Output only. The content type (MIME type) of the file.
      "downloadUri": "A String", # Output only. The download URL which should be used to allow a human user to download the attachment. Chat apps shouldn't use this URL to download attachment content.
      "driveDataRef": { # A reference to the data of a drive attachment. # Output only. A reference to the Google Drive attachment. This field is used with the Google Drive API.
        "driveFileId": "A String", # The ID for the drive file. Use with the Drive API.
      },
      "name": "A String", # Resource name of the attachment, in the form `spaces/*/messages/*/attachments/*`.
      "source": "A String", # Output only. The source of the attachment.
      "thumbnailUri": "A String", # Output only. The thumbnail URL which should be used to preview the attachment to a human user. Chat apps shouldn't use this URL to download attachment content.
    },
  ],
  "cards": [ # Deprecated: Use `cards_v2` instead. Rich, formatted, and interactive cards that you can use to display UI elements such as: formatted texts, buttons, and clickable images. Cards are normally displayed below the plain-text body of the message. `cards` and `cards_v2` can have a maximum size of 32 KB.
    { # A card is a UI element that can contain UI widgets such as text and images.
      "cardActions": [ # The actions of this card.
        { # A card action is the action associated with the card. For an invoice card, a typical action would be: delete invoice, email invoice or open the invoice in browser. Not supported by Google Chat apps.
          "actionLabel": "A String", # The label used to be displayed in the action menu item.
          "onClick": { # An `onclick` action (for example, open a link). # The onclick action for this action item.
            "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
              "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
              "parameters": [ # List of action parameters.
                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                  "key": "A String", # The name of the parameter for the action script.
                  "value": "A String", # The value of the parameter.
                },
              ],
            },
            "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
              "url": "A String", # The URL to open.
            },
          },
        },
      ],
      "header": { # The header of the card. A header usually contains a title and an image.
        "imageStyle": "A String", # The image's type (for example, square border or circular border).
        "imageUrl": "A String", # The URL of the image in the card header.
        "subtitle": "A String", # The subtitle of the card header.
        "title": "A String", # The title must be specified. The header has a fixed height: if both a title and subtitle is specified, each takes up one line. If only the title is specified, it takes up both lines.
      },
      "name": "A String", # Name of the card.
      "sections": [ # Sections are separated by a line divider.
        { # A section contains a collection of widgets that are rendered (vertically) in the order that they are specified. Across all platforms, cards have a narrow fixed width, so there's currently no need for layout properties (for example, float).
          "header": "A String", # The header of the section. Formatted text is supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
          "widgets": [ # A section must contain at least one widget.
            { # A widget is a UI element that presents text and images.
              "buttons": [ # A list of buttons. Buttons is also `oneof data` and only one of these fields should be set.
                { # A button. Can be a text button or an image button.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
              ],
              "image": { # An image that's specified by a URL and can have an `onclick` action. # Display an image in this widget.
                "aspectRatio": 3.14, # The aspect ratio of this image (width and height). This field lets you reserve the right height for the image while waiting for it to load. It's not meant to override the built-in aspect ratio of the image. If unset, the server fills it by prefetching the image.
                "imageUrl": "A String", # The URL of the image.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
              },
              "keyValue": { # A UI element contains a key (label) and a value (content). This element can also contain some actions such as `onclick` button. # Display a key value item in this widget.
                "bottomLabel": "A String", # The text of the bottom label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "button": { # A button. Can be a text button or an image button. # A button that can be clicked to trigger an action.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
                "content": "A String", # The text of the content. Formatted text supported and always required. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "contentMultiline": True or False, # If the content should be multiline.
                "icon": "A String", # An enum value that's replaced by the Chat API with the corresponding icon image.
                "iconUrl": "A String", # The icon specified by a URL.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action. Only the top label, bottom label, and content region are clickable.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
                "topLabel": "A String", # The text of the top label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              },
              "textParagraph": { # A paragraph of text. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Display a text paragraph in this widget.
                "text": "A String",
              },
            },
          ],
        },
      ],
    },
  ],
  "cardsV2": [ # An array of [cards](https://developers.google.com/chat/api/reference/rest/v1/cards). Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the messages can't contain cards. To learn about cards and how to create them, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui).
    { # A [card](https://developers.google.com/chat/api/reference/rest/v1/cards) in a Google Chat message. Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the message can't contain cards.
      "card": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # A card. Maximum size is 32 KB.
        "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
          { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
            "actionLabel": "A String", # The label that displays as the action menu item.
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
          },
        ],
        "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
        "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
          "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
          "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
        },
        "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
        "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "sectionDividerStyle": "A String", # The divider style between sections.
        "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
          { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
            "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
            "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
            "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
            "widgets": [ # All the widgets in the section. Must contain at least one widget.
              { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                  "buttons": [ # An array of buttons.
                    { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                  ],
                },
                "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                  "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                    { # A column.
                      "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                      "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                      "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                      "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                        { # The supported widgets that you can include in a column.
                          "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                            "buttons": [ # An array of buttons.
                              { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                            ],
                          },
                          "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                            "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                            "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                            "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                            "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                          },
                          "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                            "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                            "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                              },
                              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "text": "A String", # The text displayed inside the button.
                            },
                            "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                            "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                              "controlType": "A String", # How the switch appears in the user interface.
                              "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "selected": True or False, # When `true`, the switch is selected.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                            "topLabel": "A String", # The text that appears above `text`. Always truncates.
                            "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                          },
                          "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                            "altText": "A String", # The alternative text of this image that's used for accessibility.
                            "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                          },
                          "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                            "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                              { # An item that users can select in a selection input, such as a checkbox or switch.
                                "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                "text": "A String", # The text that identifies or describes the item to users.
                                "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                            ],
                            "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                            "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                            "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                            "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                              "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                              "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                    "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  },
                                },
                              },
                            },
                            "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                          },
                          "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                            "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                            "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                              "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                { # One suggested value that users can enter in a text input field.
                                  "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                },
                              ],
                            },
                            "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                            "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                            "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                          },
                          "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                            "text": "A String", # The text that's shown in the widget.
                          },
                        },
                      ],
                    },
                  ],
                },
                "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                  "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                  "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                  "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                  "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                },
                "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                  "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                  "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                    "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                    "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text displayed inside the button.
                  },
                  "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                    "controlType": "A String", # How the switch appears in the user interface.
                    "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "selected": True or False, # When `true`, the switch is selected.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                  "topLabel": "A String", # The text that appears above `text`. Always truncates.
                  "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                },
                "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                },
                "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                  "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                    "cornerRadius": 42, # The corner radius for the border.
                    "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "type": "A String", # The border type.
                  },
                  "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                  "items": [ # The items to display in the grid.
                    { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                      "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                      "image": { # Represents an image. # The image that displays in the grid item.
                        "altText": "A String", # The accessibility label for the image.
                        "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                          "cornerRadius": 42, # The corner radius for the border.
                          "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                            "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                            "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                            "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                            "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                          },
                          "type": "A String", # The border type.
                        },
                        "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                          "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                          "type": "A String", # The crop type.
                        },
                        "imageUri": "A String", # The image URL.
                      },
                      "layout": "A String", # The layout to use for the grid item.
                      "subtitle": "A String", # The grid item's subtitle.
                      "title": "A String", # The grid item's title.
                    },
                  ],
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "title": "A String", # The text that displays in the grid header.
                },
                "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                  "altText": "A String", # The alternative text of this image that's used for accessibility.
                  "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                },
                "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                  "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                    { # An item that users can select in a selection input, such as a checkbox or switch.
                      "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                      "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                      "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                      "text": "A String", # The text that identifies or describes the item to users.
                      "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                  ],
                  "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                  "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                  "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                  "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                    "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                    "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                      "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                        "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                          "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                        },
                      },
                    },
                  },
                  "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                },
                "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                  "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                  "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                    "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                      { # One suggested value that users can enter in a text input field.
                        "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                      },
                    ],
                  },
                  "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                  "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                  "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                },
                "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                  "text": "A String", # The text that's shown in the widget.
                },
              },
            ],
          },
        ],
      },
      "cardId": "A String", # Required if the message contains multiple cards. A unique identifier for a card in a message.
    },
  ],
  "clientAssignedMessageId": "A String", # A custom name for a Chat message assigned at creation. Must start with `client-` and contain only lowercase letters, numbers, and hyphens up to 63 characters in length. Specify this field to get, update, or delete the message with the specified value. Assigning a custom name lets a Chat app recall the message without saving the message `name` from the [response body](/chat/api/reference/rest/v1/spaces.messages/get#response-body) returned when creating the message. Assigning a custom name doesn't replace the generated `name` field, the message's resource name. Instead, it sets the custom name as the `clientAssignedMessageId` field, which you can reference while processing later operations, like updating or deleting the message. For example usage, see [Name a created message](https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message).
  "createTime": "A String", # For spaces created in Chat, the time at which the message was created. This field is output only, except when used in imported spaces. [Developer Preview](https://developers.google.com/workspace/preview): For imported spaces, set this field to the historical timestamp at which the message was created in the source in order to preserve the original creation time.
  "deleteTime": "A String", # Output only. The time at which the message was deleted in Google Chat. If the message is never deleted, this field is empty.
  "deletionMetadata": { # Information about a deleted message. A message is deleted when `delete_time` is set. # Output only. Information about a deleted message. A message is deleted when `delete_time` is set.
    "deletionType": "A String", # Indicates who deleted the message.
  },
  "emojiReactionSummaries": [ # Output only. The list of emoji reaction summaries on the message.
    { # The number of people who reacted to a message with a specific emoji.
      "emoji": { # An emoji that is used as a reaction to a message. # Emoji associated with the reactions.
        "customEmoji": { # Represents a custom emoji. # Output only. A custom emoji.
          "uid": "A String", # Unique key for the custom emoji resource.
        },
        "unicode": "A String", # A basic emoji represented by a unicode string.
      },
      "reactionCount": 42, # The total number of reactions using the associated emoji.
    },
  ],
  "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards can't be displayed—for example, mobile notifications.
  "lastUpdateTime": "A String", # Output only. The time at which the message was last edited by a user. If the message has never been edited, this field is empty.
  "matchedUrl": { # A matched URL in a Chat message. Chat apps can preview matched URLs. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links). # Output only. A URL in `spaces.messages.text` that matches a link preview pattern. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links).
    "url": "A String", # Output only. The URL that was matched.
  },
  "name": "A String", # Resource name in the form `spaces/*/messages/*`. Example: `spaces/AAAAAAAAAAA/messages/BBBBBBBBBBB.BBBBBBBBBBB`
  "quotedMessageMetadata": { # Information about a quoted message. # Output only. Information about a message that's quoted by a Google Chat user in a space. Google Chat users can quote a message to reply to it.
    "lastUpdateTime": "A String", # Output only. The timestamp when the quoted message was created or when the quoted message was last updated.
    "name": "A String", # Output only. Resource name of the quoted message. Format: `spaces/{space}/messages/{message}`
  },
  "sender": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # Output only. The user who created the message. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [user](https://developers.google.com/chat/api/reference/rest/v1/User) `name` and `type`.
    "displayName": "A String", # Output only. The user's display name.
    "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
    "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
    "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
    "type": "A String", # User type.
  },
  "slashCommand": { # A [slash command](https://developers.google.com/chat/how-tos/slash-commands) in Google Chat. # Output only. Slash command information, if applicable.
    "commandId": "A String", # The ID of the slash command invoked.
  },
  "space": { # A space in Google Chat. Spaces are conversations between two or more users or 1:1 messages between a user and a Chat app. # If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [space](https://developers.google.com/chat/api/reference/rest/v1/spaces) `name`.
    "adminInstalled": True or False, # Output only. Whether the Chat app was installed by a Google Workspace administrator. Administrators can install a Chat app for their domain, organizational unit, or a group of users. Administrators can only install Chat apps for direct messaging between users and the app. To support admin install, your app must feature direct messaging.
    "displayName": "A String", # The space's display name. Required when [creating a space](https://developers.google.com/chat/api/reference/rest/v1/spaces/create). If you receive the error message `ALREADY_EXISTS` when creating a space or updating the `displayName`, try a different `displayName`. An existing space within the Google Workspace organization might already use this display name. For direct messages, this field might be empty. Supports up to 128 characters.
    "externalUserAllowed": True or False, # Immutable. Whether this space permits any Google Chat user as a member. Input when creating a space in a Google Workspace organization. For Google Chat users that use a Google Account, omit this field when creating a space (By default, the space permits any Google Chat user). For existing spaces, this field is output only.
    "name": "A String", # Resource name of the space. Format: `spaces/{space}`
    "singleUserBotDm": True or False, # Optional. Whether the space is a DM between a Chat app and a single human.
    "spaceDetails": { # Details about the space including description and rules. # Details about the space including description and rules.
      "description": "A String", # Optional. A description of the space. For example, describe the space's discussion topic, functional purpose, or participants. Supports up to 150 characters.
      "guidelines": "A String", # Optional. The space's rules, expectations, and etiquette. Supports up to 5,000 characters.
    },
    "spaceHistoryState": "A String", # The message history state for messages and threads in this space.
    "spaceThreadingState": "A String", # Output only. The threading state in the Chat space.
    "spaceType": "A String", # The type of space. Required when creating a space or updating the space type of a space. Output only for other usage.
    "threaded": True or False, # Output only. Deprecated: Use `spaceThreadingState` instead. Whether messages are threaded in this space.
    "type": "A String", # Output only. Deprecated: Use `space_type` instead. The type of a space.
  },
  "text": "A String", # Plain-text body of the message. The first link to an image, video, or web page generates a [preview chip](https://developers.google.com/chat/how-tos/preview-links). You can also [@mention a Google Chat user](https://developers.google.com/chat/api/guides/message-formats/text#messages-@mention), or everyone in the space. To learn about creating text messages, see [Create a text message](https://developers.google.com/chat/api/guides/message-formats/text).
  "thread": { # A thread in a Google Chat space. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/v1/messages/create#create-message-thread). If you specify a thread when creating a message, you can set the [`messageReplyOption`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages/create#messagereplyoption) field to determine what happens if no matching thread is found. # The thread the message belongs to. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/crudl/messages#start_or_reply_to_a_message_thread).
    "name": "A String", # Output only. Resource name of the thread. Example: `spaces/{space}/threads/{thread}`
    "threadKey": "A String", # Optional. Input for creating or updating a thread. Otherwise, output only. ID for the thread. Supports up to 4000 characters. This ID is unique to the Chat app that sets it. For example, if multiple Chat apps create a message using the same thread key, the messages are posted in different threads. To reply in a thread created by a person or another Chat app, specify the thread `name` field instead.
  },
  "threadReply": True or False, # Output only. When `true`, the message is a response in a reply thread. When `false`, the message is visible in the space's top-level conversation as either the first message of a thread or a message with no threaded replies. If the space doesn't support reply in threads, this field is always `false`.
}

  allowMissing: boolean, Optional. If `true` and the message isn't found, a new message is created and `updateMask` is ignored. The specified message ID must be [client-assigned](https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message) or the request fails.
  updateMask: string, Required. The field paths to update. Separate multiple values with commas. Currently supported field paths: - `text` - `attachment` - `cards` (Requires [service account authentication](/chat/api/guides/auth/service-accounts).) - `cards_v2` (Requires [service account authentication](/chat/api/guides/auth/service-accounts).)
  x__xgafv: string, V1 error format.
    Allowed values
      1 - v1 error format
      2 - v2 error format

Returns:
  An object of the form:

    { # A message in a Google Chat space.
  "actionResponse": { # Parameters that a Chat app can use to configure how its response is posted. # Input only. Parameters that a Chat app can use to configure how its response is posted.
    "dialogAction": { # Contains a [dialog](https://developers.google.com/chat/how-tos/dialogs) and request status code. # Input only. A response to an event related to a [dialog](https://developers.google.com/chat/how-tos/dialogs). Must be accompanied by `ResponseType.Dialog`.
      "actionStatus": { # Represents the status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). # Input only. Status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). Displays a status and message to users, if necessary. For example, in case of an error or success.
        "statusCode": "A String", # The status code.
        "userFacingMessage": "A String", # The message to send users about the status of their request. If unset, a generic message based on the `status_code` is sent.
      },
      "dialog": { # Wrapper around the card body of the dialog. # Input only. [Dialog](https://developers.google.com/chat/how-tos/dialogs) for the request.
        "body": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # Input only. Body of the dialog, which is rendered in a modal. Google Chat apps don't support the following card entities: `DateTimePicker`, `OnChangeAction`.
          "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
            { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
              "actionLabel": "A String", # The label that displays as the action menu item.
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
            },
          ],
          "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
          "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
            "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
            "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
          },
          "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
          "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "sectionDividerStyle": "A String", # The divider style between sections.
          "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
            { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
              "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
              "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
              "widgets": [ # All the widgets in the section. Must contain at least one widget.
                { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                  "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                    "buttons": [ # An array of buttons.
                      { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                        "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                        "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                          "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                          "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                          "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                          "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                        },
                        "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                        "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                          "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                          "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                          "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                          "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                        },
                        "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                          "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                            "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                            "openAs": "A String", # How to open a link. Not supported by Chat apps.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "text": "A String", # The text displayed inside the button.
                      },
                    ],
                  },
                  "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                    "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                      { # A column.
                        "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                        "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                        "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                        "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                          { # The supported widgets that you can include in a column.
                            "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                              "buttons": [ # An array of buttons.
                                { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                  "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                  "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                    "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                    "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                    "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                    "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                  },
                                  "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                  },
                                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                      "url": "A String", # The URL to open.
                                    },
                                  },
                                  "text": "A String", # The text displayed inside the button.
                                },
                              ],
                            },
                            "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                              "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                              "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                              "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                              "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                            },
                            "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                              "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                              "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                              "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                                "controlType": "A String", # How the switch appears in the user interface.
                                "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "selected": True or False, # When `true`, the switch is selected.
                                "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                              "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                              "topLabel": "A String", # The text that appears above `text`. Always truncates.
                              "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                            },
                            "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                              "altText": "A String", # The alternative text of this image that's used for accessibility.
                              "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                            },
                            "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                              "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                                { # An item that users can select in a selection input, such as a checkbox or switch.
                                  "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                  "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "text": "A String", # The text that identifies or describes the item to users.
                                  "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                },
                              ],
                              "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                              "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                              "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                              "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                                "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                                "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                      "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                    },
                                  },
                                },
                              },
                              "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                            },
                            "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                              "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                              "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                                "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                  { # One suggested value that users can enter in a text input field.
                                    "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                  },
                                ],
                              },
                              "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                              "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                              "text": "A String", # The text that's shown in the widget.
                            },
                          },
                        ],
                      },
                    ],
                  },
                  "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                    "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                    "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                    "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                    "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                  },
                  "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                    "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                    "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                    "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                      "controlType": "A String", # How the switch appears in the user interface.
                      "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "selected": True or False, # When `true`, the switch is selected.
                      "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                    "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                    "topLabel": "A String", # The text that appears above `text`. Always truncates.
                    "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                  },
                  "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                  },
                  "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                    "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                      "cornerRadius": 42, # The corner radius for the border.
                      "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "type": "A String", # The border type.
                    },
                    "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                    "items": [ # The items to display in the grid.
                      { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                        "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                        "image": { # Represents an image. # The image that displays in the grid item.
                          "altText": "A String", # The accessibility label for the image.
                          "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                            "cornerRadius": 42, # The corner radius for the border.
                            "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                            },
                            "type": "A String", # The border type.
                          },
                          "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                            "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                            "type": "A String", # The crop type.
                          },
                          "imageUri": "A String", # The image URL.
                        },
                        "layout": "A String", # The layout to use for the grid item.
                        "subtitle": "A String", # The grid item's subtitle.
                        "title": "A String", # The grid item's title.
                      },
                    ],
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "title": "A String", # The text that displays in the grid header.
                  },
                  "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                  "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                    "altText": "A String", # The alternative text of this image that's used for accessibility.
                    "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                    "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                      { # An item that users can select in a selection input, such as a checkbox or switch.
                        "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                        "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                        "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                        "text": "A String", # The text that identifies or describes the item to users.
                        "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      },
                    ],
                    "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                    "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                    "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                    "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                      "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                      "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                        "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                          "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                            "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                          },
                        },
                      },
                    },
                    "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                  },
                  "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                    "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                    "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                      "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                        { # One suggested value that users can enter in a text input field.
                          "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                        },
                      ],
                    },
                    "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                    "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                    "text": "A String", # The text that's shown in the widget.
                  },
                },
              ],
            },
          ],
        },
      },
    },
    "type": "A String", # Input only. The type of Chat app response.
    "url": "A String", # Input only. URL for users to authenticate or configure. (Only for `REQUEST_CONFIG` response types.)
  },
  "annotations": [ # Output only. Annotations associated with the `text` in this message.
    { # Output only. Annotations associated with the plain-text body of the message. To add basic formatting to a text message, see [Format text messages](https://developers.google.com/chat/api/guides/message-formats/text#format-texts). Example plain-text message body: ``` Hello @FooBot how are you!" ``` The corresponding annotations metadata: ``` "annotations":[{ "type":"USER_MENTION", "startIndex":6, "length":7, "userMention": { "user": { "name":"users/{user}", "displayName":"FooBot", "avatarUrl":"https://goo.gl/aeDtrS", "type":"BOT" }, "type":"MENTION" } }] ```
      "length": 42, # Length of the substring in the plain-text message body this annotation corresponds to.
      "slashCommand": { # Annotation metadata for slash commands (/). # The metadata for a slash command.
        "bot": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The Chat app whose command was invoked.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
        "commandId": "A String", # The command ID of the invoked slash command.
        "commandName": "A String", # The name of the invoked slash command.
        "triggersDialog": True or False, # Indicates whether the slash command is for a dialog.
        "type": "A String", # The type of slash command.
      },
      "startIndex": 42, # Start index (0-based, inclusive) in the plain-text message body this annotation corresponds to.
      "type": "A String", # The type of this annotation.
      "userMention": { # Annotation metadata for user mentions (@). # The metadata of user mention.
        "type": "A String", # The type of user mention.
        "user": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The user mentioned.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
      },
    },
  ],
  "argumentText": "A String", # Output only. Plain-text body of the message with all Chat app mentions stripped out.
  "attachedGifs": [ # Output only. GIF images that are attached to the message.
    { # A GIF image that's specified by a URL.
      "uri": "A String", # Output only. The URL that hosts the GIF image.
    },
  ],
  "attachment": [ # User-uploaded attachment.
    { # An attachment in Google Chat.
      "attachmentDataRef": { # A reference to the attachment data. This field is used with the media API to download the attachment data.
        "attachmentUploadToken": "A String", # Opaque token containing a reference to an uploaded attachment. Treated by clients as an opaque string and used to create or update Chat messages with attachments.
        "resourceName": "A String", # The resource name of the attachment data. This field is used with the media API to download the attachment data.
      },
      "contentName": "A String", # Output only. The original file name for the content, not the full path.
      "contentType": "A String", # Output only. The content type (MIME type) of the file.
      "downloadUri": "A String", # Output only. The download URL which should be used to allow a human user to download the attachment. Chat apps shouldn't use this URL to download attachment content.
      "driveDataRef": { # A reference to the data of a drive attachment. # Output only. A reference to the Google Drive attachment. This field is used with the Google Drive API.
        "driveFileId": "A String", # The ID for the drive file. Use with the Drive API.
      },
      "name": "A String", # Resource name of the attachment, in the form `spaces/*/messages/*/attachments/*`.
      "source": "A String", # Output only. The source of the attachment.
      "thumbnailUri": "A String", # Output only. The thumbnail URL which should be used to preview the attachment to a human user. Chat apps shouldn't use this URL to download attachment content.
    },
  ],
  "cards": [ # Deprecated: Use `cards_v2` instead. Rich, formatted, and interactive cards that you can use to display UI elements such as: formatted texts, buttons, and clickable images. Cards are normally displayed below the plain-text body of the message. `cards` and `cards_v2` can have a maximum size of 32 KB.
    { # A card is a UI element that can contain UI widgets such as text and images.
      "cardActions": [ # The actions of this card.
        { # A card action is the action associated with the card. For an invoice card, a typical action would be: delete invoice, email invoice or open the invoice in browser. Not supported by Google Chat apps.
          "actionLabel": "A String", # The label used to be displayed in the action menu item.
          "onClick": { # An `onclick` action (for example, open a link). # The onclick action for this action item.
            "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
              "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
              "parameters": [ # List of action parameters.
                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                  "key": "A String", # The name of the parameter for the action script.
                  "value": "A String", # The value of the parameter.
                },
              ],
            },
            "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
              "url": "A String", # The URL to open.
            },
          },
        },
      ],
      "header": { # The header of the card. A header usually contains a title and an image.
        "imageStyle": "A String", # The image's type (for example, square border or circular border).
        "imageUrl": "A String", # The URL of the image in the card header.
        "subtitle": "A String", # The subtitle of the card header.
        "title": "A String", # The title must be specified. The header has a fixed height: if both a title and subtitle is specified, each takes up one line. If only the title is specified, it takes up both lines.
      },
      "name": "A String", # Name of the card.
      "sections": [ # Sections are separated by a line divider.
        { # A section contains a collection of widgets that are rendered (vertically) in the order that they are specified. Across all platforms, cards have a narrow fixed width, so there's currently no need for layout properties (for example, float).
          "header": "A String", # The header of the section. Formatted text is supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
          "widgets": [ # A section must contain at least one widget.
            { # A widget is a UI element that presents text and images.
              "buttons": [ # A list of buttons. Buttons is also `oneof data` and only one of these fields should be set.
                { # A button. Can be a text button or an image button.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
              ],
              "image": { # An image that's specified by a URL and can have an `onclick` action. # Display an image in this widget.
                "aspectRatio": 3.14, # The aspect ratio of this image (width and height). This field lets you reserve the right height for the image while waiting for it to load. It's not meant to override the built-in aspect ratio of the image. If unset, the server fills it by prefetching the image.
                "imageUrl": "A String", # The URL of the image.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
              },
              "keyValue": { # A UI element contains a key (label) and a value (content). This element can also contain some actions such as `onclick` button. # Display a key value item in this widget.
                "bottomLabel": "A String", # The text of the bottom label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "button": { # A button. Can be a text button or an image button. # A button that can be clicked to trigger an action.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
                "content": "A String", # The text of the content. Formatted text supported and always required. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "contentMultiline": True or False, # If the content should be multiline.
                "icon": "A String", # An enum value that's replaced by the Chat API with the corresponding icon image.
                "iconUrl": "A String", # The icon specified by a URL.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action. Only the top label, bottom label, and content region are clickable.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
                "topLabel": "A String", # The text of the top label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              },
              "textParagraph": { # A paragraph of text. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Display a text paragraph in this widget.
                "text": "A String",
              },
            },
          ],
        },
      ],
    },
  ],
  "cardsV2": [ # An array of [cards](https://developers.google.com/chat/api/reference/rest/v1/cards). Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the messages can't contain cards. To learn about cards and how to create them, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui).
    { # A [card](https://developers.google.com/chat/api/reference/rest/v1/cards) in a Google Chat message. Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the message can't contain cards.
      "card": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # A card. Maximum size is 32 KB.
        "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
          { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
            "actionLabel": "A String", # The label that displays as the action menu item.
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
          },
        ],
        "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
        "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
          "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
          "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
        },
        "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
        "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "sectionDividerStyle": "A String", # The divider style between sections.
        "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
          { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
            "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
            "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
            "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
            "widgets": [ # All the widgets in the section. Must contain at least one widget.
              { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                  "buttons": [ # An array of buttons.
                    { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                  ],
                },
                "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                  "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                    { # A column.
                      "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                      "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                      "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                      "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                        { # The supported widgets that you can include in a column.
                          "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                            "buttons": [ # An array of buttons.
                              { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                            ],
                          },
                          "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                            "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                            "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                            "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                            "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                          },
                          "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                            "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                            "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                              },
                              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "text": "A String", # The text displayed inside the button.
                            },
                            "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                            "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                              "controlType": "A String", # How the switch appears in the user interface.
                              "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "selected": True or False, # When `true`, the switch is selected.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                            "topLabel": "A String", # The text that appears above `text`. Always truncates.
                            "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                          },
                          "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                            "altText": "A String", # The alternative text of this image that's used for accessibility.
                            "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                          },
                          "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                            "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                              { # An item that users can select in a selection input, such as a checkbox or switch.
                                "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                "text": "A String", # The text that identifies or describes the item to users.
                                "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                            ],
                            "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                            "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                            "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                            "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                              "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                              "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                    "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  },
                                },
                              },
                            },
                            "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                          },
                          "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                            "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                            "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                              "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                { # One suggested value that users can enter in a text input field.
                                  "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                },
                              ],
                            },
                            "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                            "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                            "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                          },
                          "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                            "text": "A String", # The text that's shown in the widget.
                          },
                        },
                      ],
                    },
                  ],
                },
                "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                  "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                  "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                  "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                  "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                },
                "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                  "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                  "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                    "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                    "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text displayed inside the button.
                  },
                  "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                    "controlType": "A String", # How the switch appears in the user interface.
                    "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "selected": True or False, # When `true`, the switch is selected.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                  "topLabel": "A String", # The text that appears above `text`. Always truncates.
                  "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                },
                "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                },
                "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                  "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                    "cornerRadius": 42, # The corner radius for the border.
                    "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "type": "A String", # The border type.
                  },
                  "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                  "items": [ # The items to display in the grid.
                    { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                      "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                      "image": { # Represents an image. # The image that displays in the grid item.
                        "altText": "A String", # The accessibility label for the image.
                        "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                          "cornerRadius": 42, # The corner radius for the border.
                          "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                            "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                            "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                            "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                            "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                          },
                          "type": "A String", # The border type.
                        },
                        "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                          "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                          "type": "A String", # The crop type.
                        },
                        "imageUri": "A String", # The image URL.
                      },
                      "layout": "A String", # The layout to use for the grid item.
                      "subtitle": "A String", # The grid item's subtitle.
                      "title": "A String", # The grid item's title.
                    },
                  ],
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "title": "A String", # The text that displays in the grid header.
                },
                "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                  "altText": "A String", # The alternative text of this image that's used for accessibility.
                  "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                },
                "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                  "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                    { # An item that users can select in a selection input, such as a checkbox or switch.
                      "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                      "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                      "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                      "text": "A String", # The text that identifies or describes the item to users.
                      "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                  ],
                  "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                  "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                  "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                  "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                    "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                    "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                      "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                        "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                          "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                        },
                      },
                    },
                  },
                  "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                },
                "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                  "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                  "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                    "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                      { # One suggested value that users can enter in a text input field.
                        "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                      },
                    ],
                  },
                  "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                  "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                  "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                },
                "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                  "text": "A String", # The text that's shown in the widget.
                },
              },
            ],
          },
        ],
      },
      "cardId": "A String", # Required if the message contains multiple cards. A unique identifier for a card in a message.
    },
  ],
  "clientAssignedMessageId": "A String", # A custom name for a Chat message assigned at creation. Must start with `client-` and contain only lowercase letters, numbers, and hyphens up to 63 characters in length. Specify this field to get, update, or delete the message with the specified value. Assigning a custom name lets a Chat app recall the message without saving the message `name` from the [response body](/chat/api/reference/rest/v1/spaces.messages/get#response-body) returned when creating the message. Assigning a custom name doesn't replace the generated `name` field, the message's resource name. Instead, it sets the custom name as the `clientAssignedMessageId` field, which you can reference while processing later operations, like updating or deleting the message. For example usage, see [Name a created message](https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message).
  "createTime": "A String", # For spaces created in Chat, the time at which the message was created. This field is output only, except when used in imported spaces. [Developer Preview](https://developers.google.com/workspace/preview): For imported spaces, set this field to the historical timestamp at which the message was created in the source in order to preserve the original creation time.
  "deleteTime": "A String", # Output only. The time at which the message was deleted in Google Chat. If the message is never deleted, this field is empty.
  "deletionMetadata": { # Information about a deleted message. A message is deleted when `delete_time` is set. # Output only. Information about a deleted message. A message is deleted when `delete_time` is set.
    "deletionType": "A String", # Indicates who deleted the message.
  },
  "emojiReactionSummaries": [ # Output only. The list of emoji reaction summaries on the message.
    { # The number of people who reacted to a message with a specific emoji.
      "emoji": { # An emoji that is used as a reaction to a message. # Emoji associated with the reactions.
        "customEmoji": { # Represents a custom emoji. # Output only. A custom emoji.
          "uid": "A String", # Unique key for the custom emoji resource.
        },
        "unicode": "A String", # A basic emoji represented by a unicode string.
      },
      "reactionCount": 42, # The total number of reactions using the associated emoji.
    },
  ],
  "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards can't be displayed—for example, mobile notifications.
  "lastUpdateTime": "A String", # Output only. The time at which the message was last edited by a user. If the message has never been edited, this field is empty.
  "matchedUrl": { # A matched URL in a Chat message. Chat apps can preview matched URLs. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links). # Output only. A URL in `spaces.messages.text` that matches a link preview pattern. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links).
    "url": "A String", # Output only. The URL that was matched.
  },
  "name": "A String", # Resource name in the form `spaces/*/messages/*`. Example: `spaces/AAAAAAAAAAA/messages/BBBBBBBBBBB.BBBBBBBBBBB`
  "quotedMessageMetadata": { # Information about a quoted message. # Output only. Information about a message that's quoted by a Google Chat user in a space. Google Chat users can quote a message to reply to it.
    "lastUpdateTime": "A String", # Output only. The timestamp when the quoted message was created or when the quoted message was last updated.
    "name": "A String", # Output only. Resource name of the quoted message. Format: `spaces/{space}/messages/{message}`
  },
  "sender": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # Output only. The user who created the message. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [user](https://developers.google.com/chat/api/reference/rest/v1/User) `name` and `type`.
    "displayName": "A String", # Output only. The user's display name.
    "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
    "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
    "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
    "type": "A String", # User type.
  },
  "slashCommand": { # A [slash command](https://developers.google.com/chat/how-tos/slash-commands) in Google Chat. # Output only. Slash command information, if applicable.
    "commandId": "A String", # The ID of the slash command invoked.
  },
  "space": { # A space in Google Chat. Spaces are conversations between two or more users or 1:1 messages between a user and a Chat app. # If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [space](https://developers.google.com/chat/api/reference/rest/v1/spaces) `name`.
    "adminInstalled": True or False, # Output only. Whether the Chat app was installed by a Google Workspace administrator. Administrators can install a Chat app for their domain, organizational unit, or a group of users. Administrators can only install Chat apps for direct messaging between users and the app. To support admin install, your app must feature direct messaging.
    "displayName": "A String", # The space's display name. Required when [creating a space](https://developers.google.com/chat/api/reference/rest/v1/spaces/create). If you receive the error message `ALREADY_EXISTS` when creating a space or updating the `displayName`, try a different `displayName`. An existing space within the Google Workspace organization might already use this display name. For direct messages, this field might be empty. Supports up to 128 characters.
    "externalUserAllowed": True or False, # Immutable. Whether this space permits any Google Chat user as a member. Input when creating a space in a Google Workspace organization. For Google Chat users that use a Google Account, omit this field when creating a space (By default, the space permits any Google Chat user). For existing spaces, this field is output only.
    "name": "A String", # Resource name of the space. Format: `spaces/{space}`
    "singleUserBotDm": True or False, # Optional. Whether the space is a DM between a Chat app and a single human.
    "spaceDetails": { # Details about the space including description and rules. # Details about the space including description and rules.
      "description": "A String", # Optional. A description of the space. For example, describe the space's discussion topic, functional purpose, or participants. Supports up to 150 characters.
      "guidelines": "A String", # Optional. The space's rules, expectations, and etiquette. Supports up to 5,000 characters.
    },
    "spaceHistoryState": "A String", # The message history state for messages and threads in this space.
    "spaceThreadingState": "A String", # Output only. The threading state in the Chat space.
    "spaceType": "A String", # The type of space. Required when creating a space or updating the space type of a space. Output only for other usage.
    "threaded": True or False, # Output only. Deprecated: Use `spaceThreadingState` instead. Whether messages are threaded in this space.
    "type": "A String", # Output only. Deprecated: Use `space_type` instead. The type of a space.
  },
  "text": "A String", # Plain-text body of the message. The first link to an image, video, or web page generates a [preview chip](https://developers.google.com/chat/how-tos/preview-links). You can also [@mention a Google Chat user](https://developers.google.com/chat/api/guides/message-formats/text#messages-@mention), or everyone in the space. To learn about creating text messages, see [Create a text message](https://developers.google.com/chat/api/guides/message-formats/text).
  "thread": { # A thread in a Google Chat space. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/v1/messages/create#create-message-thread). If you specify a thread when creating a message, you can set the [`messageReplyOption`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages/create#messagereplyoption) field to determine what happens if no matching thread is found. # The thread the message belongs to. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/crudl/messages#start_or_reply_to_a_message_thread).
    "name": "A String", # Output only. Resource name of the thread. Example: `spaces/{space}/threads/{thread}`
    "threadKey": "A String", # Optional. Input for creating or updating a thread. Otherwise, output only. ID for the thread. Supports up to 4000 characters. This ID is unique to the Chat app that sets it. For example, if multiple Chat apps create a message using the same thread key, the messages are posted in different threads. To reply in a thread created by a person or another Chat app, specify the thread `name` field instead.
  },
  "threadReply": True or False, # Output only. When `true`, the message is a response in a reply thread. When `false`, the message is visible in the space's top-level conversation as either the first message of a thread or a message with no threaded replies. If the space doesn't support reply in threads, this field is always `false`.
}
update(name, allowMissing=None, body=None, updateMask=None, x__xgafv=None)
Updates a message. There's a difference between the `patch` and `update` methods. The `patch` method uses a `patch` request while the `update` method uses a `put` request. We recommend using the `patch` method. For an example, see [Update a message](https://developers.google.com/chat/api/guides/v1/messages/update). Requires [authentication](https://developers.google.com/chat/api/guides/auth). Fully supports [service account authentication](https://developers.google.com/chat/api/guides/auth/service-accounts) and [user authentication](https://developers.google.com/chat/api/guides/auth/users). [User authentication](https://developers.google.com/chat/api/guides/auth/users). Requests authenticated with service accounts can only update messages created by the calling Chat app.

Args:
  name: string, Resource name in the form `spaces/*/messages/*`. Example: `spaces/AAAAAAAAAAA/messages/BBBBBBBBBBB.BBBBBBBBBBB` (required)
  body: object, The request body.
    The object takes the form of:

{ # A message in a Google Chat space.
  "actionResponse": { # Parameters that a Chat app can use to configure how its response is posted. # Input only. Parameters that a Chat app can use to configure how its response is posted.
    "dialogAction": { # Contains a [dialog](https://developers.google.com/chat/how-tos/dialogs) and request status code. # Input only. A response to an event related to a [dialog](https://developers.google.com/chat/how-tos/dialogs). Must be accompanied by `ResponseType.Dialog`.
      "actionStatus": { # Represents the status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). # Input only. Status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). Displays a status and message to users, if necessary. For example, in case of an error or success.
        "statusCode": "A String", # The status code.
        "userFacingMessage": "A String", # The message to send users about the status of their request. If unset, a generic message based on the `status_code` is sent.
      },
      "dialog": { # Wrapper around the card body of the dialog. # Input only. [Dialog](https://developers.google.com/chat/how-tos/dialogs) for the request.
        "body": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # Input only. Body of the dialog, which is rendered in a modal. Google Chat apps don't support the following card entities: `DateTimePicker`, `OnChangeAction`.
          "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
            { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
              "actionLabel": "A String", # The label that displays as the action menu item.
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
            },
          ],
          "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
          "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
            "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
            "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
          },
          "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
          "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "sectionDividerStyle": "A String", # The divider style between sections.
          "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
            { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
              "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
              "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
              "widgets": [ # All the widgets in the section. Must contain at least one widget.
                { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                  "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                    "buttons": [ # An array of buttons.
                      { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                        "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                        "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                          "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                          "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                          "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                          "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                        },
                        "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                        "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                          "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                          "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                          "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                          "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                        },
                        "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                          "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                            "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                            "openAs": "A String", # How to open a link. Not supported by Chat apps.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "text": "A String", # The text displayed inside the button.
                      },
                    ],
                  },
                  "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                    "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                      { # A column.
                        "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                        "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                        "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                        "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                          { # The supported widgets that you can include in a column.
                            "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                              "buttons": [ # An array of buttons.
                                { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                  "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                  "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                    "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                    "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                    "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                    "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                  },
                                  "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                  },
                                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                      "url": "A String", # The URL to open.
                                    },
                                  },
                                  "text": "A String", # The text displayed inside the button.
                                },
                              ],
                            },
                            "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                              "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                              "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                              "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                              "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                            },
                            "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                              "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                              "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                              "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                                "controlType": "A String", # How the switch appears in the user interface.
                                "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "selected": True or False, # When `true`, the switch is selected.
                                "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                              "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                              "topLabel": "A String", # The text that appears above `text`. Always truncates.
                              "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                            },
                            "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                              "altText": "A String", # The alternative text of this image that's used for accessibility.
                              "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                            },
                            "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                              "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                                { # An item that users can select in a selection input, such as a checkbox or switch.
                                  "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                  "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "text": "A String", # The text that identifies or describes the item to users.
                                  "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                },
                              ],
                              "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                              "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                              "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                              "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                                "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                                "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                      "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                    },
                                  },
                                },
                              },
                              "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                            },
                            "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                              "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                              "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                                "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                  { # One suggested value that users can enter in a text input field.
                                    "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                  },
                                ],
                              },
                              "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                              "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                              "text": "A String", # The text that's shown in the widget.
                            },
                          },
                        ],
                      },
                    ],
                  },
                  "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                    "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                    "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                    "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                    "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                  },
                  "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                    "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                    "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                    "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                      "controlType": "A String", # How the switch appears in the user interface.
                      "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "selected": True or False, # When `true`, the switch is selected.
                      "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                    "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                    "topLabel": "A String", # The text that appears above `text`. Always truncates.
                    "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                  },
                  "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                  },
                  "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                    "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                      "cornerRadius": 42, # The corner radius for the border.
                      "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "type": "A String", # The border type.
                    },
                    "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                    "items": [ # The items to display in the grid.
                      { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                        "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                        "image": { # Represents an image. # The image that displays in the grid item.
                          "altText": "A String", # The accessibility label for the image.
                          "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                            "cornerRadius": 42, # The corner radius for the border.
                            "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                            },
                            "type": "A String", # The border type.
                          },
                          "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                            "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                            "type": "A String", # The crop type.
                          },
                          "imageUri": "A String", # The image URL.
                        },
                        "layout": "A String", # The layout to use for the grid item.
                        "subtitle": "A String", # The grid item's subtitle.
                        "title": "A String", # The grid item's title.
                      },
                    ],
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "title": "A String", # The text that displays in the grid header.
                  },
                  "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                  "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                    "altText": "A String", # The alternative text of this image that's used for accessibility.
                    "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                    "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                      { # An item that users can select in a selection input, such as a checkbox or switch.
                        "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                        "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                        "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                        "text": "A String", # The text that identifies or describes the item to users.
                        "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      },
                    ],
                    "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                    "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                    "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                    "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                      "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                      "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                        "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                          "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                            "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                          },
                        },
                      },
                    },
                    "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                  },
                  "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                    "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                    "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                      "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                        { # One suggested value that users can enter in a text input field.
                          "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                        },
                      ],
                    },
                    "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                    "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                    "text": "A String", # The text that's shown in the widget.
                  },
                },
              ],
            },
          ],
        },
      },
    },
    "type": "A String", # Input only. The type of Chat app response.
    "url": "A String", # Input only. URL for users to authenticate or configure. (Only for `REQUEST_CONFIG` response types.)
  },
  "annotations": [ # Output only. Annotations associated with the `text` in this message.
    { # Output only. Annotations associated with the plain-text body of the message. To add basic formatting to a text message, see [Format text messages](https://developers.google.com/chat/api/guides/message-formats/text#format-texts). Example plain-text message body: ``` Hello @FooBot how are you!" ``` The corresponding annotations metadata: ``` "annotations":[{ "type":"USER_MENTION", "startIndex":6, "length":7, "userMention": { "user": { "name":"users/{user}", "displayName":"FooBot", "avatarUrl":"https://goo.gl/aeDtrS", "type":"BOT" }, "type":"MENTION" } }] ```
      "length": 42, # Length of the substring in the plain-text message body this annotation corresponds to.
      "slashCommand": { # Annotation metadata for slash commands (/). # The metadata for a slash command.
        "bot": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The Chat app whose command was invoked.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
        "commandId": "A String", # The command ID of the invoked slash command.
        "commandName": "A String", # The name of the invoked slash command.
        "triggersDialog": True or False, # Indicates whether the slash command is for a dialog.
        "type": "A String", # The type of slash command.
      },
      "startIndex": 42, # Start index (0-based, inclusive) in the plain-text message body this annotation corresponds to.
      "type": "A String", # The type of this annotation.
      "userMention": { # Annotation metadata for user mentions (@). # The metadata of user mention.
        "type": "A String", # The type of user mention.
        "user": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The user mentioned.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
      },
    },
  ],
  "argumentText": "A String", # Output only. Plain-text body of the message with all Chat app mentions stripped out.
  "attachedGifs": [ # Output only. GIF images that are attached to the message.
    { # A GIF image that's specified by a URL.
      "uri": "A String", # Output only. The URL that hosts the GIF image.
    },
  ],
  "attachment": [ # User-uploaded attachment.
    { # An attachment in Google Chat.
      "attachmentDataRef": { # A reference to the attachment data. This field is used with the media API to download the attachment data.
        "attachmentUploadToken": "A String", # Opaque token containing a reference to an uploaded attachment. Treated by clients as an opaque string and used to create or update Chat messages with attachments.
        "resourceName": "A String", # The resource name of the attachment data. This field is used with the media API to download the attachment data.
      },
      "contentName": "A String", # Output only. The original file name for the content, not the full path.
      "contentType": "A String", # Output only. The content type (MIME type) of the file.
      "downloadUri": "A String", # Output only. The download URL which should be used to allow a human user to download the attachment. Chat apps shouldn't use this URL to download attachment content.
      "driveDataRef": { # A reference to the data of a drive attachment. # Output only. A reference to the Google Drive attachment. This field is used with the Google Drive API.
        "driveFileId": "A String", # The ID for the drive file. Use with the Drive API.
      },
      "name": "A String", # Resource name of the attachment, in the form `spaces/*/messages/*/attachments/*`.
      "source": "A String", # Output only. The source of the attachment.
      "thumbnailUri": "A String", # Output only. The thumbnail URL which should be used to preview the attachment to a human user. Chat apps shouldn't use this URL to download attachment content.
    },
  ],
  "cards": [ # Deprecated: Use `cards_v2` instead. Rich, formatted, and interactive cards that you can use to display UI elements such as: formatted texts, buttons, and clickable images. Cards are normally displayed below the plain-text body of the message. `cards` and `cards_v2` can have a maximum size of 32 KB.
    { # A card is a UI element that can contain UI widgets such as text and images.
      "cardActions": [ # The actions of this card.
        { # A card action is the action associated with the card. For an invoice card, a typical action would be: delete invoice, email invoice or open the invoice in browser. Not supported by Google Chat apps.
          "actionLabel": "A String", # The label used to be displayed in the action menu item.
          "onClick": { # An `onclick` action (for example, open a link). # The onclick action for this action item.
            "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
              "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
              "parameters": [ # List of action parameters.
                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                  "key": "A String", # The name of the parameter for the action script.
                  "value": "A String", # The value of the parameter.
                },
              ],
            },
            "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
              "url": "A String", # The URL to open.
            },
          },
        },
      ],
      "header": { # The header of the card. A header usually contains a title and an image.
        "imageStyle": "A String", # The image's type (for example, square border or circular border).
        "imageUrl": "A String", # The URL of the image in the card header.
        "subtitle": "A String", # The subtitle of the card header.
        "title": "A String", # The title must be specified. The header has a fixed height: if both a title and subtitle is specified, each takes up one line. If only the title is specified, it takes up both lines.
      },
      "name": "A String", # Name of the card.
      "sections": [ # Sections are separated by a line divider.
        { # A section contains a collection of widgets that are rendered (vertically) in the order that they are specified. Across all platforms, cards have a narrow fixed width, so there's currently no need for layout properties (for example, float).
          "header": "A String", # The header of the section. Formatted text is supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
          "widgets": [ # A section must contain at least one widget.
            { # A widget is a UI element that presents text and images.
              "buttons": [ # A list of buttons. Buttons is also `oneof data` and only one of these fields should be set.
                { # A button. Can be a text button or an image button.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
              ],
              "image": { # An image that's specified by a URL and can have an `onclick` action. # Display an image in this widget.
                "aspectRatio": 3.14, # The aspect ratio of this image (width and height). This field lets you reserve the right height for the image while waiting for it to load. It's not meant to override the built-in aspect ratio of the image. If unset, the server fills it by prefetching the image.
                "imageUrl": "A String", # The URL of the image.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
              },
              "keyValue": { # A UI element contains a key (label) and a value (content). This element can also contain some actions such as `onclick` button. # Display a key value item in this widget.
                "bottomLabel": "A String", # The text of the bottom label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "button": { # A button. Can be a text button or an image button. # A button that can be clicked to trigger an action.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
                "content": "A String", # The text of the content. Formatted text supported and always required. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "contentMultiline": True or False, # If the content should be multiline.
                "icon": "A String", # An enum value that's replaced by the Chat API with the corresponding icon image.
                "iconUrl": "A String", # The icon specified by a URL.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action. Only the top label, bottom label, and content region are clickable.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
                "topLabel": "A String", # The text of the top label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              },
              "textParagraph": { # A paragraph of text. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Display a text paragraph in this widget.
                "text": "A String",
              },
            },
          ],
        },
      ],
    },
  ],
  "cardsV2": [ # An array of [cards](https://developers.google.com/chat/api/reference/rest/v1/cards). Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the messages can't contain cards. To learn about cards and how to create them, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui).
    { # A [card](https://developers.google.com/chat/api/reference/rest/v1/cards) in a Google Chat message. Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the message can't contain cards.
      "card": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # A card. Maximum size is 32 KB.
        "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
          { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
            "actionLabel": "A String", # The label that displays as the action menu item.
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
          },
        ],
        "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
        "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
          "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
          "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
        },
        "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
        "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "sectionDividerStyle": "A String", # The divider style between sections.
        "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
          { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
            "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
            "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
            "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
            "widgets": [ # All the widgets in the section. Must contain at least one widget.
              { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                  "buttons": [ # An array of buttons.
                    { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                  ],
                },
                "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                  "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                    { # A column.
                      "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                      "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                      "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                      "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                        { # The supported widgets that you can include in a column.
                          "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                            "buttons": [ # An array of buttons.
                              { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                            ],
                          },
                          "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                            "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                            "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                            "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                            "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                          },
                          "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                            "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                            "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                              },
                              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "text": "A String", # The text displayed inside the button.
                            },
                            "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                            "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                              "controlType": "A String", # How the switch appears in the user interface.
                              "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "selected": True or False, # When `true`, the switch is selected.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                            "topLabel": "A String", # The text that appears above `text`. Always truncates.
                            "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                          },
                          "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                            "altText": "A String", # The alternative text of this image that's used for accessibility.
                            "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                          },
                          "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                            "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                              { # An item that users can select in a selection input, such as a checkbox or switch.
                                "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                "text": "A String", # The text that identifies or describes the item to users.
                                "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                            ],
                            "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                            "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                            "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                            "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                              "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                              "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                    "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  },
                                },
                              },
                            },
                            "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                          },
                          "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                            "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                            "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                              "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                { # One suggested value that users can enter in a text input field.
                                  "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                },
                              ],
                            },
                            "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                            "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                            "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                          },
                          "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                            "text": "A String", # The text that's shown in the widget.
                          },
                        },
                      ],
                    },
                  ],
                },
                "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                  "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                  "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                  "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                  "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                },
                "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                  "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                  "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                    "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                    "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text displayed inside the button.
                  },
                  "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                    "controlType": "A String", # How the switch appears in the user interface.
                    "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "selected": True or False, # When `true`, the switch is selected.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                  "topLabel": "A String", # The text that appears above `text`. Always truncates.
                  "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                },
                "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                },
                "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                  "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                    "cornerRadius": 42, # The corner radius for the border.
                    "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "type": "A String", # The border type.
                  },
                  "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                  "items": [ # The items to display in the grid.
                    { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                      "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                      "image": { # Represents an image. # The image that displays in the grid item.
                        "altText": "A String", # The accessibility label for the image.
                        "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                          "cornerRadius": 42, # The corner radius for the border.
                          "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                            "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                            "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                            "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                            "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                          },
                          "type": "A String", # The border type.
                        },
                        "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                          "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                          "type": "A String", # The crop type.
                        },
                        "imageUri": "A String", # The image URL.
                      },
                      "layout": "A String", # The layout to use for the grid item.
                      "subtitle": "A String", # The grid item's subtitle.
                      "title": "A String", # The grid item's title.
                    },
                  ],
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "title": "A String", # The text that displays in the grid header.
                },
                "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                  "altText": "A String", # The alternative text of this image that's used for accessibility.
                  "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                },
                "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                  "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                    { # An item that users can select in a selection input, such as a checkbox or switch.
                      "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                      "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                      "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                      "text": "A String", # The text that identifies or describes the item to users.
                      "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                  ],
                  "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                  "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                  "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                  "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                    "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                    "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                      "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                        "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                          "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                        },
                      },
                    },
                  },
                  "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                },
                "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                  "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                  "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                    "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                      { # One suggested value that users can enter in a text input field.
                        "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                      },
                    ],
                  },
                  "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                  "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                  "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                },
                "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                  "text": "A String", # The text that's shown in the widget.
                },
              },
            ],
          },
        ],
      },
      "cardId": "A String", # Required if the message contains multiple cards. A unique identifier for a card in a message.
    },
  ],
  "clientAssignedMessageId": "A String", # A custom name for a Chat message assigned at creation. Must start with `client-` and contain only lowercase letters, numbers, and hyphens up to 63 characters in length. Specify this field to get, update, or delete the message with the specified value. Assigning a custom name lets a Chat app recall the message without saving the message `name` from the [response body](/chat/api/reference/rest/v1/spaces.messages/get#response-body) returned when creating the message. Assigning a custom name doesn't replace the generated `name` field, the message's resource name. Instead, it sets the custom name as the `clientAssignedMessageId` field, which you can reference while processing later operations, like updating or deleting the message. For example usage, see [Name a created message](https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message).
  "createTime": "A String", # For spaces created in Chat, the time at which the message was created. This field is output only, except when used in imported spaces. [Developer Preview](https://developers.google.com/workspace/preview): For imported spaces, set this field to the historical timestamp at which the message was created in the source in order to preserve the original creation time.
  "deleteTime": "A String", # Output only. The time at which the message was deleted in Google Chat. If the message is never deleted, this field is empty.
  "deletionMetadata": { # Information about a deleted message. A message is deleted when `delete_time` is set. # Output only. Information about a deleted message. A message is deleted when `delete_time` is set.
    "deletionType": "A String", # Indicates who deleted the message.
  },
  "emojiReactionSummaries": [ # Output only. The list of emoji reaction summaries on the message.
    { # The number of people who reacted to a message with a specific emoji.
      "emoji": { # An emoji that is used as a reaction to a message. # Emoji associated with the reactions.
        "customEmoji": { # Represents a custom emoji. # Output only. A custom emoji.
          "uid": "A String", # Unique key for the custom emoji resource.
        },
        "unicode": "A String", # A basic emoji represented by a unicode string.
      },
      "reactionCount": 42, # The total number of reactions using the associated emoji.
    },
  ],
  "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards can't be displayed—for example, mobile notifications.
  "lastUpdateTime": "A String", # Output only. The time at which the message was last edited by a user. If the message has never been edited, this field is empty.
  "matchedUrl": { # A matched URL in a Chat message. Chat apps can preview matched URLs. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links). # Output only. A URL in `spaces.messages.text` that matches a link preview pattern. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links).
    "url": "A String", # Output only. The URL that was matched.
  },
  "name": "A String", # Resource name in the form `spaces/*/messages/*`. Example: `spaces/AAAAAAAAAAA/messages/BBBBBBBBBBB.BBBBBBBBBBB`
  "quotedMessageMetadata": { # Information about a quoted message. # Output only. Information about a message that's quoted by a Google Chat user in a space. Google Chat users can quote a message to reply to it.
    "lastUpdateTime": "A String", # Output only. The timestamp when the quoted message was created or when the quoted message was last updated.
    "name": "A String", # Output only. Resource name of the quoted message. Format: `spaces/{space}/messages/{message}`
  },
  "sender": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # Output only. The user who created the message. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [user](https://developers.google.com/chat/api/reference/rest/v1/User) `name` and `type`.
    "displayName": "A String", # Output only. The user's display name.
    "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
    "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
    "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
    "type": "A String", # User type.
  },
  "slashCommand": { # A [slash command](https://developers.google.com/chat/how-tos/slash-commands) in Google Chat. # Output only. Slash command information, if applicable.
    "commandId": "A String", # The ID of the slash command invoked.
  },
  "space": { # A space in Google Chat. Spaces are conversations between two or more users or 1:1 messages between a user and a Chat app. # If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [space](https://developers.google.com/chat/api/reference/rest/v1/spaces) `name`.
    "adminInstalled": True or False, # Output only. Whether the Chat app was installed by a Google Workspace administrator. Administrators can install a Chat app for their domain, organizational unit, or a group of users. Administrators can only install Chat apps for direct messaging between users and the app. To support admin install, your app must feature direct messaging.
    "displayName": "A String", # The space's display name. Required when [creating a space](https://developers.google.com/chat/api/reference/rest/v1/spaces/create). If you receive the error message `ALREADY_EXISTS` when creating a space or updating the `displayName`, try a different `displayName`. An existing space within the Google Workspace organization might already use this display name. For direct messages, this field might be empty. Supports up to 128 characters.
    "externalUserAllowed": True or False, # Immutable. Whether this space permits any Google Chat user as a member. Input when creating a space in a Google Workspace organization. For Google Chat users that use a Google Account, omit this field when creating a space (By default, the space permits any Google Chat user). For existing spaces, this field is output only.
    "name": "A String", # Resource name of the space. Format: `spaces/{space}`
    "singleUserBotDm": True or False, # Optional. Whether the space is a DM between a Chat app and a single human.
    "spaceDetails": { # Details about the space including description and rules. # Details about the space including description and rules.
      "description": "A String", # Optional. A description of the space. For example, describe the space's discussion topic, functional purpose, or participants. Supports up to 150 characters.
      "guidelines": "A String", # Optional. The space's rules, expectations, and etiquette. Supports up to 5,000 characters.
    },
    "spaceHistoryState": "A String", # The message history state for messages and threads in this space.
    "spaceThreadingState": "A String", # Output only. The threading state in the Chat space.
    "spaceType": "A String", # The type of space. Required when creating a space or updating the space type of a space. Output only for other usage.
    "threaded": True or False, # Output only. Deprecated: Use `spaceThreadingState` instead. Whether messages are threaded in this space.
    "type": "A String", # Output only. Deprecated: Use `space_type` instead. The type of a space.
  },
  "text": "A String", # Plain-text body of the message. The first link to an image, video, or web page generates a [preview chip](https://developers.google.com/chat/how-tos/preview-links). You can also [@mention a Google Chat user](https://developers.google.com/chat/api/guides/message-formats/text#messages-@mention), or everyone in the space. To learn about creating text messages, see [Create a text message](https://developers.google.com/chat/api/guides/message-formats/text).
  "thread": { # A thread in a Google Chat space. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/v1/messages/create#create-message-thread). If you specify a thread when creating a message, you can set the [`messageReplyOption`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages/create#messagereplyoption) field to determine what happens if no matching thread is found. # The thread the message belongs to. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/crudl/messages#start_or_reply_to_a_message_thread).
    "name": "A String", # Output only. Resource name of the thread. Example: `spaces/{space}/threads/{thread}`
    "threadKey": "A String", # Optional. Input for creating or updating a thread. Otherwise, output only. ID for the thread. Supports up to 4000 characters. This ID is unique to the Chat app that sets it. For example, if multiple Chat apps create a message using the same thread key, the messages are posted in different threads. To reply in a thread created by a person or another Chat app, specify the thread `name` field instead.
  },
  "threadReply": True or False, # Output only. When `true`, the message is a response in a reply thread. When `false`, the message is visible in the space's top-level conversation as either the first message of a thread or a message with no threaded replies. If the space doesn't support reply in threads, this field is always `false`.
}

  allowMissing: boolean, Optional. If `true` and the message isn't found, a new message is created and `updateMask` is ignored. The specified message ID must be [client-assigned](https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message) or the request fails.
  updateMask: string, Required. The field paths to update. Separate multiple values with commas. Currently supported field paths: - `text` - `attachment` - `cards` (Requires [service account authentication](/chat/api/guides/auth/service-accounts).) - `cards_v2` (Requires [service account authentication](/chat/api/guides/auth/service-accounts).)
  x__xgafv: string, V1 error format.
    Allowed values
      1 - v1 error format
      2 - v2 error format

Returns:
  An object of the form:

    { # A message in a Google Chat space.
  "actionResponse": { # Parameters that a Chat app can use to configure how its response is posted. # Input only. Parameters that a Chat app can use to configure how its response is posted.
    "dialogAction": { # Contains a [dialog](https://developers.google.com/chat/how-tos/dialogs) and request status code. # Input only. A response to an event related to a [dialog](https://developers.google.com/chat/how-tos/dialogs). Must be accompanied by `ResponseType.Dialog`.
      "actionStatus": { # Represents the status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). # Input only. Status for a request to either invoke or submit a [dialog](https://developers.google.com/chat/how-tos/dialogs). Displays a status and message to users, if necessary. For example, in case of an error or success.
        "statusCode": "A String", # The status code.
        "userFacingMessage": "A String", # The message to send users about the status of their request. If unset, a generic message based on the `status_code` is sent.
      },
      "dialog": { # Wrapper around the card body of the dialog. # Input only. [Dialog](https://developers.google.com/chat/how-tos/dialogs) for the request.
        "body": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # Input only. Body of the dialog, which is rendered in a modal. Google Chat apps don't support the following card entities: `DateTimePicker`, `OnChangeAction`.
          "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
            { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
              "actionLabel": "A String", # The label that displays as the action menu item.
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
            },
          ],
          "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
          "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
            "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
            "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
              },
              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
              },
              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                  "parameters": [ # List of action parameters.
                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                      "key": "A String", # The name of the parameter for the action script.
                      "value": "A String", # The value of the parameter.
                    },
                  ],
                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                },
                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                  "url": "A String", # The URL to open.
                },
              },
              "text": "A String", # The text displayed inside the button.
            },
          },
          "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
          "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
            "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
            "imageType": "A String", # The shape used to crop the image.
            "imageUrl": "A String", # The HTTPS URL of the image in the card header.
            "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
            "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
          },
          "sectionDividerStyle": "A String", # The divider style between sections.
          "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
            { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
              "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
              "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
              "widgets": [ # All the widgets in the section. Must contain at least one widget.
                { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                  "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                    "buttons": [ # An array of buttons.
                      { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                        "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                        "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                          "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                          "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                          "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                          "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                        },
                        "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                        "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                          "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                          "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                          "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                          "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                        },
                        "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                          "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                            "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                            "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                            "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                            "parameters": [ # List of action parameters.
                              { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                "key": "A String", # The name of the parameter for the action script.
                                "value": "A String", # The value of the parameter.
                              },
                            ],
                            "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                          },
                          "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                            "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                            "openAs": "A String", # How to open a link. Not supported by Chat apps.
                            "url": "A String", # The URL to open.
                          },
                        },
                        "text": "A String", # The text displayed inside the button.
                      },
                    ],
                  },
                  "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                    "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                      { # A column.
                        "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                        "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                        "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                        "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                          { # The supported widgets that you can include in a column.
                            "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                              "buttons": [ # An array of buttons.
                                { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                  "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                  "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                    "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                    "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                    "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                    "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                  },
                                  "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                  },
                                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                      "parameters": [ # List of action parameters.
                                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                          "key": "A String", # The name of the parameter for the action script.
                                          "value": "A String", # The value of the parameter.
                                        },
                                      ],
                                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                    },
                                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                      "url": "A String", # The URL to open.
                                    },
                                  },
                                  "text": "A String", # The text displayed inside the button.
                                },
                              ],
                            },
                            "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                              "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                              "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                              "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                              "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                            },
                            "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                              "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                              "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                              "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                                "controlType": "A String", # How the switch appears in the user interface.
                                "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "selected": True or False, # When `true`, the switch is selected.
                                "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                              "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                              "topLabel": "A String", # The text that appears above `text`. Always truncates.
                              "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                            },
                            "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                              "altText": "A String", # The alternative text of this image that's used for accessibility.
                              "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                            },
                            "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                              "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                                { # An item that users can select in a selection input, such as a checkbox or switch.
                                  "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                  "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "text": "A String", # The text that identifies or describes the item to users.
                                  "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                },
                              ],
                              "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                              "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                              "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                              "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                                "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                                "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                    "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                      "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                    },
                                  },
                                },
                              },
                              "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                            },
                            "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                              "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                              "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                                "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                  { # One suggested value that users can enter in a text input field.
                                    "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                  },
                                ],
                              },
                              "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                              "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                              "text": "A String", # The text that's shown in the widget.
                            },
                          },
                        ],
                      },
                    ],
                  },
                  "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                    "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                    "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                    "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                    "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                  },
                  "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                    "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                    "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                    "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                      "controlType": "A String", # How the switch appears in the user interface.
                      "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "selected": True or False, # When `true`, the switch is selected.
                      "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                    "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                    "topLabel": "A String", # The text that appears above `text`. Always truncates.
                    "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                  },
                  "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                  },
                  "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                    "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                      "cornerRadius": 42, # The corner radius for the border.
                      "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "type": "A String", # The border type.
                    },
                    "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                    "items": [ # The items to display in the grid.
                      { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                        "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                        "image": { # Represents an image. # The image that displays in the grid item.
                          "altText": "A String", # The accessibility label for the image.
                          "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                            "cornerRadius": 42, # The corner radius for the border.
                            "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                            },
                            "type": "A String", # The border type.
                          },
                          "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                            "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                            "type": "A String", # The crop type.
                          },
                          "imageUri": "A String", # The image URL.
                        },
                        "layout": "A String", # The layout to use for the grid item.
                        "subtitle": "A String", # The grid item's subtitle.
                        "title": "A String", # The grid item's title.
                      },
                    ],
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "title": "A String", # The text that displays in the grid header.
                  },
                  "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                  "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                    "altText": "A String", # The alternative text of this image that's used for accessibility.
                    "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                    "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                      { # An item that users can select in a selection input, such as a checkbox or switch.
                        "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                        "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                        "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                        "text": "A String", # The text that identifies or describes the item to users.
                        "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      },
                    ],
                    "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                    "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                    "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                    "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                      "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                      "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                        "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                          "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                            "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                          },
                        },
                      },
                    },
                    "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                  },
                  "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                    "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                    "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                      "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                        { # One suggested value that users can enter in a text input field.
                          "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                        },
                      ],
                    },
                    "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                    "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                    "text": "A String", # The text that's shown in the widget.
                  },
                },
              ],
            },
          ],
        },
      },
    },
    "type": "A String", # Input only. The type of Chat app response.
    "url": "A String", # Input only. URL for users to authenticate or configure. (Only for `REQUEST_CONFIG` response types.)
  },
  "annotations": [ # Output only. Annotations associated with the `text` in this message.
    { # Output only. Annotations associated with the plain-text body of the message. To add basic formatting to a text message, see [Format text messages](https://developers.google.com/chat/api/guides/message-formats/text#format-texts). Example plain-text message body: ``` Hello @FooBot how are you!" ``` The corresponding annotations metadata: ``` "annotations":[{ "type":"USER_MENTION", "startIndex":6, "length":7, "userMention": { "user": { "name":"users/{user}", "displayName":"FooBot", "avatarUrl":"https://goo.gl/aeDtrS", "type":"BOT" }, "type":"MENTION" } }] ```
      "length": 42, # Length of the substring in the plain-text message body this annotation corresponds to.
      "slashCommand": { # Annotation metadata for slash commands (/). # The metadata for a slash command.
        "bot": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The Chat app whose command was invoked.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
        "commandId": "A String", # The command ID of the invoked slash command.
        "commandName": "A String", # The name of the invoked slash command.
        "triggersDialog": True or False, # Indicates whether the slash command is for a dialog.
        "type": "A String", # The type of slash command.
      },
      "startIndex": 42, # Start index (0-based, inclusive) in the plain-text message body this annotation corresponds to.
      "type": "A String", # The type of this annotation.
      "userMention": { # Annotation metadata for user mentions (@). # The metadata of user mention.
        "type": "A String", # The type of user mention.
        "user": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # The user mentioned.
          "displayName": "A String", # Output only. The user's display name.
          "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
          "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
          "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
          "type": "A String", # User type.
        },
      },
    },
  ],
  "argumentText": "A String", # Output only. Plain-text body of the message with all Chat app mentions stripped out.
  "attachedGifs": [ # Output only. GIF images that are attached to the message.
    { # A GIF image that's specified by a URL.
      "uri": "A String", # Output only. The URL that hosts the GIF image.
    },
  ],
  "attachment": [ # User-uploaded attachment.
    { # An attachment in Google Chat.
      "attachmentDataRef": { # A reference to the attachment data. This field is used with the media API to download the attachment data.
        "attachmentUploadToken": "A String", # Opaque token containing a reference to an uploaded attachment. Treated by clients as an opaque string and used to create or update Chat messages with attachments.
        "resourceName": "A String", # The resource name of the attachment data. This field is used with the media API to download the attachment data.
      },
      "contentName": "A String", # Output only. The original file name for the content, not the full path.
      "contentType": "A String", # Output only. The content type (MIME type) of the file.
      "downloadUri": "A String", # Output only. The download URL which should be used to allow a human user to download the attachment. Chat apps shouldn't use this URL to download attachment content.
      "driveDataRef": { # A reference to the data of a drive attachment. # Output only. A reference to the Google Drive attachment. This field is used with the Google Drive API.
        "driveFileId": "A String", # The ID for the drive file. Use with the Drive API.
      },
      "name": "A String", # Resource name of the attachment, in the form `spaces/*/messages/*/attachments/*`.
      "source": "A String", # Output only. The source of the attachment.
      "thumbnailUri": "A String", # Output only. The thumbnail URL which should be used to preview the attachment to a human user. Chat apps shouldn't use this URL to download attachment content.
    },
  ],
  "cards": [ # Deprecated: Use `cards_v2` instead. Rich, formatted, and interactive cards that you can use to display UI elements such as: formatted texts, buttons, and clickable images. Cards are normally displayed below the plain-text body of the message. `cards` and `cards_v2` can have a maximum size of 32 KB.
    { # A card is a UI element that can contain UI widgets such as text and images.
      "cardActions": [ # The actions of this card.
        { # A card action is the action associated with the card. For an invoice card, a typical action would be: delete invoice, email invoice or open the invoice in browser. Not supported by Google Chat apps.
          "actionLabel": "A String", # The label used to be displayed in the action menu item.
          "onClick": { # An `onclick` action (for example, open a link). # The onclick action for this action item.
            "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
              "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
              "parameters": [ # List of action parameters.
                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                  "key": "A String", # The name of the parameter for the action script.
                  "value": "A String", # The value of the parameter.
                },
              ],
            },
            "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
              "url": "A String", # The URL to open.
            },
          },
        },
      ],
      "header": { # The header of the card. A header usually contains a title and an image.
        "imageStyle": "A String", # The image's type (for example, square border or circular border).
        "imageUrl": "A String", # The URL of the image in the card header.
        "subtitle": "A String", # The subtitle of the card header.
        "title": "A String", # The title must be specified. The header has a fixed height: if both a title and subtitle is specified, each takes up one line. If only the title is specified, it takes up both lines.
      },
      "name": "A String", # Name of the card.
      "sections": [ # Sections are separated by a line divider.
        { # A section contains a collection of widgets that are rendered (vertically) in the order that they are specified. Across all platforms, cards have a narrow fixed width, so there's currently no need for layout properties (for example, float).
          "header": "A String", # The header of the section. Formatted text is supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
          "widgets": [ # A section must contain at least one widget.
            { # A widget is a UI element that presents text and images.
              "buttons": [ # A list of buttons. Buttons is also `oneof data` and only one of these fields should be set.
                { # A button. Can be a text button or an image button.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
              ],
              "image": { # An image that's specified by a URL and can have an `onclick` action. # Display an image in this widget.
                "aspectRatio": 3.14, # The aspect ratio of this image (width and height). This field lets you reserve the right height for the image while waiting for it to load. It's not meant to override the built-in aspect ratio of the image. If unset, the server fills it by prefetching the image.
                "imageUrl": "A String", # The URL of the image.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
              },
              "keyValue": { # A UI element contains a key (label) and a value (content). This element can also contain some actions such as `onclick` button. # Display a key value item in this widget.
                "bottomLabel": "A String", # The text of the bottom label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "button": { # A button. Can be a text button or an image button. # A button that can be clicked to trigger an action.
                  "imageButton": { # An image button with an `onclick` action. # A button with image and `onclick` action.
                    "icon": "A String", # The icon specified by an `enum` that indices to an icon provided by Chat API.
                    "iconUrl": "A String", # The icon specified by a URL.
                    "name": "A String", # The name of this `image_button` that's used for accessibility. Default value is provided if this name isn't specified.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                  },
                  "textButton": { # A button with text and `onclick` action. # A button with text and `onclick` action.
                    "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action of the button.
                      "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                        "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                      },
                      "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text of the button.
                  },
                },
                "content": "A String", # The text of the content. Formatted text supported and always required. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                "contentMultiline": True or False, # If the content should be multiline.
                "icon": "A String", # An enum value that's replaced by the Chat API with the corresponding icon image.
                "iconUrl": "A String", # The icon specified by a URL.
                "onClick": { # An `onclick` action (for example, open a link). # The `onclick` action. Only the top label, bottom label, and content region are clickable.
                  "action": { # A form action describes the behavior when the form is submitted. For example, you can invoke Apps Script to handle the form. # A form action is triggered by this `onclick` action if specified.
                    "actionMethodName": "A String", # The method name is used to identify which part of the form triggered the form submission. This information is echoed back to the Chat app as part of the card click event. You can use the same method name for several elements that trigger a common behavior.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters.
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                  },
                  "openLink": { # A link that opens a new window. # This `onclick` action triggers an open link action if specified.
                    "url": "A String", # The URL to open.
                  },
                },
                "topLabel": "A String", # The text of the top label. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
              },
              "textParagraph": { # A paragraph of text. Formatted text supported. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card_text_formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Display a text paragraph in this widget.
                "text": "A String",
              },
            },
          ],
        },
      ],
    },
  ],
  "cardsV2": [ # An array of [cards](https://developers.google.com/chat/api/reference/rest/v1/cards). Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the messages can't contain cards. To learn about cards and how to create them, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui).
    { # A [card](https://developers.google.com/chat/api/reference/rest/v1/cards) in a Google Chat message. Only Chat apps can create cards. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the message can't contain cards.
      "card": { # A card interface displayed in a Google Chat message or Google Workspace Add-on. Cards support a defined layout, interactive UI elements like buttons, and rich media like images. Use cards to present detailed information, gather information from users, and guide users to take a next step. To learn how to build cards, see the following documentation: * For Google Chat apps, see [Design dynamic, interactive, and consistent UIs with cards](https://developers.google.com/chat/ui). * For Google Workspace Add-ons, see [Card-based interfaces](https://developers.google.com/apps-script/add-ons/concepts/cards). **Example: Card message for a Google Chat app** ![Example contact card](https://developers.google.com/chat/images/card_api_reference.png) To create the sample card message in Google Chat, use the following JSON: ``` { "cardsV2": [ { "cardId": "unique-card-id", "card": { "header": { "title": "Sasha", "subtitle": "Software Engineer", "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "imageType": "CIRCLE", "imageAltText": "Avatar for Sasha", }, "sections": [ { "header": "Contact Info", "collapsible": true, "uncollapsibleWidgetsCount": 1, "widgets": [ { "decoratedText": { "startIcon": { "knownIcon": "EMAIL", }, "text": "sasha@example.com", } }, { "decoratedText": { "startIcon": { "knownIcon": "PERSON", }, "text": "Online", }, }, { "decoratedText": { "startIcon": { "knownIcon": "PHONE", }, "text": "+1 (555) 555-1234", } }, { "buttonList": { "buttons": [ { "text": "Share", "onClick": { "openLink": { "url": "https://example.com/share", } } }, { "text": "Edit", "onClick": { "action": { "function": "goToView", "parameters": [ { "key": "viewType", "value": "EDIT", } ], } } }, ], } }, ], }, ], }, } ], } ``` # A card. Maximum size is 32 KB.
        "cardActions": [ # The card's actions. Actions are added to the card's toolbar menu. Because Chat app cards have no toolbar, `cardActions[]` isn't supported by Chat apps. For example, the following JSON constructs a card action menu with `Settings` and `Send Feedback` options: ``` "card_actions": [ { "actionLabel": "Settings", "onClick": { "action": { "functionName": "goToView", "parameters": [ { "key": "viewType", "value": "SETTING" } ], "loadIndicator": "LoadIndicator.SPINNER" } } }, { "actionLabel": "Send Feedback", "onClick": { "openLink": { "url": "https://example.com/feedback" } } } ] ```
          { # A card action is the action associated with the card. For example, an invoice card might include actions such as delete invoice, email invoice, or open the invoice in a browser. Not supported by Chat apps.
            "actionLabel": "A String", # The label that displays as the action menu item.
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # The `onClick` action for this action item.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
          },
        ],
        "displayStyle": "A String", # In Google Workspace add-ons, sets the display properties of the `peekCardHeader`. Not supported by Chat apps.
        "fixedFooter": { # A persistent (sticky) footer that that appears at the bottom of the card. For an example in Google Chat apps, see [Card footer](https://developers.google.com/chat/ui/widgets/card-fixed-footer). Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards). # The fixed footer shown at the bottom of this card. Setting `fixedFooter` without specifying a `primaryButton` or a `secondaryButton` causes an error. Supported by Google Workspace Add-ons and Chat apps. For Chat apps, you can use fixed footers in [dialogs](https://developers.google.com/chat/how-tos/dialogs), but not [card messages](https://developers.google.com/chat/api/guides/message-formats/cards).
          "primaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The primary button of the fixed footer. The button must be a text button with text and color set.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
          "secondaryButton": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # The secondary button of the fixed footer. The button must be a text button with text and color set. If `secondaryButton` is set, you must also set `primaryButton`.
            "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
            "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
              "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
              "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
              "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
              "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
            },
            "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
            },
            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                "parameters": [ # List of action parameters.
                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                    "key": "A String", # The name of the parameter for the action script.
                    "value": "A String", # The value of the parameter.
                  },
                ],
                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
              },
              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                "url": "A String", # The URL to open.
              },
            },
            "text": "A String", # The text displayed inside the button.
          },
        },
        "header": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # The header of the card. A header usually contains a leading image and a title. Headers always appear at the top of a card.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "name": "A String", # Name of the card. Used as a card identifier in card navigation. Because Chat apps don't support card navigation, they ignore this field.
        "peekCardHeader": { # Represents a card header. For an example in Google Chat apps, see [Card header](https://developers.google.com/chat/ui/widgets/card-header). # When displaying contextual content, the peek card header acts as a placeholder so that the user can navigate forward between the homepage cards and the contextual cards. Not supported by Chat apps.
          "imageAltText": "A String", # The alternative text of this image that's used for accessibility.
          "imageType": "A String", # The shape used to crop the image.
          "imageUrl": "A String", # The HTTPS URL of the image in the card header.
          "subtitle": "A String", # The subtitle of the card header. If specified, appears on its own line below the `title`.
          "title": "A String", # Required. The title of the card header. The header has a fixed height: if both a title and subtitle are specified, each takes up one line. If only the title is specified, it takes up both lines.
        },
        "sectionDividerStyle": "A String", # The divider style between sections.
        "sections": [ # Contains a collection of widgets. Each section has its own, optional header. Sections are visually separated by a line divider. For an example in Google Chat apps, see [Card section](https://developers.google.com/chat/ui/widgets/card-section).
          { # A section contains a collection of widgets that are rendered vertically in the order that they're specified.
            "collapsible": True or False, # Indicates whether this section is collapsible. Collapsible sections hide some or all widgets, but users can expand the section to reveal the hidden widgets by clicking **Show more**. Users can hide the widgets again by clicking **Show less**. To determine which widgets are hidden, specify `uncollapsibleWidgetsCount`.
            "header": "A String", # Text that appears at the top of a section. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
            "uncollapsibleWidgetsCount": 42, # The number of uncollapsible widgets which remain visible even when a section is collapsed. For example, when a section contains five widgets and the `uncollapsibleWidgetsCount` is set to `2`, the first two widgets are always shown and the last three are collapsed by default. The `uncollapsibleWidgetsCount` is taken into account only when `collapsible` is `true`.
            "widgets": [ # All the widgets in the section. Must contain at least one widget.
              { # Each card is made up of widgets. A widget is a composite object that can represent one of text, images, buttons, and other object types.
                "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # A list of buttons. For example, the following JSON creates two buttons. The first is a blue text button and the second is an image button that opens a link: ``` "buttonList": { "buttons": [ { "text": "Edit", "color": { "red": 0, "green": 0, "blue": 1, "alpha": 1 }, "disabled": true, }, { "icon": { "knownIcon": "INVITE", "altText": "check calendar" }, "onClick": { "openLink": { "url": "https://example.com/calendar" } } } ] } ```
                  "buttons": [ # An array of buttons.
                    { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                      "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                      "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                        "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                        "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                        "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                        "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                      },
                      "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                      "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                        "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                        "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                        "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                        "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                      },
                      "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                        "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                          "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                          "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                          "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                          "parameters": [ # List of action parameters.
                            { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                              "key": "A String", # The name of the parameter for the action script.
                              "value": "A String", # The value of the parameter.
                            },
                          ],
                          "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                        },
                        "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                          "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                          "openAs": "A String", # How to open a link. Not supported by Chat apps.
                          "url": "A String", # The URL to open.
                        },
                      },
                      "text": "A String", # The text displayed inside the button.
                    },
                  ],
                },
                "columns": { # The `Columns` widget displays up to 2 columns in a card message or dialog. You can add widgets to each column; the widgets appear in the order that they are specified. For an example in Google Chat apps, see [Columns](https://developers.google.com/chat/ui/widgets/columns). The height of each column is determined by the taller column. For example, if the first column is taller than the second column, both columns have the height of the first column. Because each column can contain a different number of widgets, you can't define rows or align widgets between the columns. Columns are displayed side-by-side. You can customize the width of each column using the `HorizontalSizeStyle` field. If the user's screen width is too narrow, the second column wraps below the first: * On web, the second column wraps if the screen width is less than or equal to 480 pixels. * On iOS devices, the second column wraps if the screen width is less than or equal to 300 pt. * On Android devices, the second column wraps if the screen width is less than or equal to 320 dp. To include more than 2 columns, or to use rows, use the `Grid` widget. Supported by Chat apps, but not Google Workspace Add-ons. # Displays up to 2 columns. To include more than 2 columns, or to use rows, use the `Grid` widget. For example, the following JSON creates 2 columns that each contain text paragraphs: ``` "columns": { "columnItems": [ { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "First column text paragraph" } } ] }, { "horizontalSizeStyle": "FILL_AVAILABLE_SPACE", "horizontalAlignment": "CENTER", "verticalAlignment": "CENTER", "widgets": [ { "textParagraph": { "text": "Second column text paragraph" } } ] } ] } ```
                  "columnItems": [ # An array of columns. You can include up to 2 columns in a card or dialog.
                    { # A column.
                      "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                      "horizontalSizeStyle": "A String", # Specifies how a column fills the width of the card.
                      "verticalAlignment": "A String", # Specifies whether widgets align to the top, bottom, or center of a column.
                      "widgets": [ # An array of widgets included in a column. Widgets appear in the order that they are specified.
                        { # The supported widgets that you can include in a column.
                          "buttonList": { # A list of buttons layed out horizontally. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). # ButtonList widget.
                            "buttons": [ # An array of buttons.
                              { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action.
                                "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                                "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                  "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                  "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                  "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                  "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                                },
                                "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                                "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                  "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                  "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                  "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                  "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                                },
                                "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                  "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                    "parameters": [ # List of action parameters.
                                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                        "key": "A String", # The name of the parameter for the action script.
                                        "value": "A String", # The value of the parameter.
                                      },
                                    ],
                                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                  },
                                  "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                    "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                    "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                    "url": "A String", # The URL to open.
                                  },
                                },
                                "text": "A String", # The text displayed inside the button.
                              },
                            ],
                          },
                          "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # DateTimePicker widget.
                            "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                            "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                            "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                            "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                          },
                          "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # DecoratedText widget.
                            "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                            "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                              "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                              "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                                "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                                "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                                "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                                "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                              },
                              "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                              "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                                "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                                "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                                "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                                "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                              },
                              "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                                "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                  "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                  "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                  "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                  "parameters": [ # List of action parameters.
                                    { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                      "key": "A String", # The name of the parameter for the action script.
                                      "value": "A String", # The value of the parameter.
                                    },
                                  ],
                                  "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                                },
                                "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                  "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                  "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                  "url": "A String", # The URL to open.
                                },
                              },
                              "text": "A String", # The text displayed inside the button.
                            },
                            "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                            "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                              "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                              "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                              "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                              "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                            },
                            "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                              "controlType": "A String", # How the switch appears in the user interface.
                              "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "selected": True or False, # When `true`, the switch is selected.
                              "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            },
                            "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                            "topLabel": "A String", # The text that appears above `text`. Always truncates.
                            "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                          },
                          "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Image widget.
                            "altText": "A String", # The alternative text of this image that's used for accessibility.
                            "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                            "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                              "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                                "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                                "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                                "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                                "parameters": [ # List of action parameters.
                                  { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                    "key": "A String", # The name of the parameter for the action script.
                                    "value": "A String", # The value of the parameter.
                                  },
                                ],
                                "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                              },
                              "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                                "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                                "openAs": "A String", # How to open a link. Not supported by Chat apps.
                                "url": "A String", # The URL to open.
                              },
                            },
                          },
                          "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # SelectionInput widget.
                            "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                              { # An item that users can select in a selection input, such as a checkbox or switch.
                                "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                                "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                                "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                                "text": "A String", # The text that identifies or describes the item to users.
                                "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              },
                            ],
                            "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                            "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                            "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                            "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                              "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                              "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                                "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                                  "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                                    "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                                  },
                                },
                              },
                            },
                            "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                          },
                          "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # TextInput widget.
                            "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                            "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                              "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                                { # One suggested value that users can enter in a text input field.
                                  "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                                },
                              ],
                            },
                            "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                            "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                            "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                              "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                              "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                              "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                              "parameters": [ # List of action parameters.
                                { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                                  "key": "A String", # The name of the parameter for the action script.
                                  "value": "A String", # The value of the parameter.
                                },
                              ],
                              "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                            },
                            "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                            "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                          },
                          "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # TextParagraph widget.
                            "text": "A String", # The text that's shown in the widget.
                          },
                        },
                      ],
                    },
                  ],
                },
                "dateTimePicker": { # Lets users input a date, a time, or both a date and a time. For an example in Google Chat apps, see [Date time picker](https://developers.google.com/chat/ui/widgets/date-time-picker). Users can input text or use the picker to select dates and times. If users input an invalid date or time, the picker shows an error that prompts users to input the information correctly. # Displays a widget that lets users input a date, time, or date and time. For example, the following JSON creates a date time picker to schedule an appointment: ``` "dateTimePicker": { "name": "appointment_time", "label": "Book your appointment at:", "type": "DATE_AND_TIME", "valueMsEpoch": "796435200000" } ```
                  "label": "A String", # The text that prompts users to input a date, a time, or a date and time. For example, if users are scheduling an appointment, use a label such as `Appointment date` or `Appointment date and time`.
                  "name": "A String", # The name by which the `DateTimePicker` is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Triggered when the user clicks **Save** or **Clear** from the `DateTimePicker` interface.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "timezoneOffsetDate": 42, # The number representing the time zone offset from UTC, in minutes. If set, the `value_ms_epoch` is displayed in the specified time zone. If unset, the value defaults to the user's time zone setting.
                  "type": "A String", # Whether the widget supports inputting a date, a time, or the date and time.
                  "valueMsEpoch": "A String", # The default value displayed in the widget, in milliseconds since [Unix epoch time](https://en.wikipedia.org/wiki/Unix_time). Specify the value based on the type of picker (`DateTimePickerType`): * `DATE_AND_TIME`: a calendar date and time in UTC. For example, to represent January 1, 2023 at 12:00 PM UTC, use `1672574400000`. * `DATE_ONLY`: a calendar date at 00:00:00 UTC. For example, to represent January 1, 2023, use `1672531200000`. * `TIME_ONLY`: a time in UTC. For example, to represent 12:00 PM, use `43200000` (or `12 * 60 * 60 * 1000`).
                },
                "decoratedText": { # A widget that displays text with optional decorations such as a label above or below the text, an icon in front of the text, a selection widget, or a button after the text. For an example in Google Chat apps, see [Decorated text](https://developers.google.com/chat/ui/widgets/decorated-text). # Displays a decorated text item. For example, the following JSON creates a decorated text widget showing email address: ``` "decoratedText": { "icon": { "knownIcon": "EMAIL" }, "topLabel": "Email Address", "text": "sasha@example.com", "bottomLabel": "This is a new Email address!", "switchControl": { "name": "has_send_welcome_email_to_sasha", "selected": false, "controlType": "CHECKBOX" } } ```
                  "bottomLabel": "A String", # The text that appears below `text`. Always wraps.
                  "button": { # A text, icon, or text and icon button that users can click. For an example in Google Chat apps, see [Button list](https://developers.google.com/chat/ui/widgets/button-list). To make an image a clickable button, specify an `Image` (not an `ImageComponent`) and set an `onClick` action. # A button that a user can click to trigger an action.
                    "altText": "A String", # The alternative text that's used for accessibility. Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".
                    "color": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text. If unset, the image background is white and the font color is blue. For red, green, and blue, the value of each field is a `float` number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale. Optionally set `alpha`, which sets a level of transparency using this equation: ``` pixel color = alpha * (this color) + (1.0 - alpha) * (background color) ``` For `alpha`, a value of `1` corresponds with a solid color, and a value of `0` corresponds with a completely transparent color. For example, the following color represents a half transparent red: ``` "color": { "red": 1, "green": 0, "blue": 0, "alpha": 0.5 } ```
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "disabled": True or False, # If `true`, the button is displayed in an inactive state and doesn't respond to user actions.
                    "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon image. If both `icon` and `text` are set, then the icon appears before the text.
                      "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                      "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                      "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                      "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                    },
                    "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.
                      "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                        "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                        "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                        "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                        "parameters": [ # List of action parameters.
                          { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                            "key": "A String", # The name of the parameter for the action script.
                            "value": "A String", # The value of the parameter.
                          },
                        ],
                        "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                      },
                      "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                        "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                        "openAs": "A String", # How to open a link. Not supported by Chat apps.
                        "url": "A String", # The URL to open.
                      },
                    },
                    "text": "A String", # The text displayed inside the button.
                  },
                  "endIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # An icon displayed after the text. Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "icon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # Deprecated in favor of `startIcon`.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This action is triggered when users click `topLabel` or `bottomLabel`.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "startIcon": { # An icon displayed in a widget on a card. For an example in Google Chat apps, see [Icon](https://developers.google.com/chat/ui/widgets/icon). Supports [built-in](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons) and [custom](https://developers.google.com/chat/api/guides/message-formats/cards#customicons) icons. # The icon displayed in front of the text.
                    "altText": "A String", # Optional. A description of the icon used for accessibility. If unspecified, the default value `Button` is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, `A user's account portrait`, or `Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat`. If the icon is set in a `Button`, the `altText` appears as helper text when the user hovers over the button. However, if the button also sets `text`, the icon's `altText` is ignored.
                    "iconUrl": "A String", # Display a custom icon hosted at an HTTPS URL. For example: ``` "iconUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png" ``` Supported file types include `.png` and `.jpg`.
                    "imageType": "A String", # The crop style applied to the image. In some cases, applying a `CIRCLE` crop causes the image to be drawn larger than a built-in icon.
                    "knownIcon": "A String", # Display one of the built-in icons provided by Google Workspace. For example, to display an airplane icon, specify `AIRPLANE`. For a bus, specify `BUS`. For a full list of supported icons, see [built-in icons](https://developers.google.com/chat/api/guides/message-formats/cards#builtinicons).
                  },
                  "switchControl": { # Either a toggle-style switch or a checkbox inside a `decoratedText` widget. Only supported in the `decoratedText` widget. # A switch widget that a user can click to change its state and trigger an action.
                    "controlType": "A String", # How the switch appears in the user interface.
                    "name": "A String", # The name by which the switch widget is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # The action to perform when the switch state is changed, such as what function to run.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "selected": True or False, # When `true`, the switch is selected.
                    "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  },
                  "text": "A String", # Required. The primary text. Supports simple formatting. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting).
                  "topLabel": "A String", # The text that appears above `text`. Always truncates.
                  "wrapText": True or False, # The wrap text setting. If `true`, the text wraps and displays on multiple lines. Otherwise, the text is truncated. Only applies to `text`, not `topLabel` and `bottomLabel`.
                },
                "divider": { # Displays a divider between widgets as a horizontal line. For an example in Google Chat apps, see [Divider](https://developers.google.com/chat/ui/widgets/divider). For example, the following JSON creates a divider: ``` "divider": {} ``` # Displays a horizontal line divider between widgets. For example, the following JSON creates a divider: ``` "divider": { } ```
                },
                "grid": { # Displays a grid with a collection of items. Items can only include text or images. For responsive columns, or to include more than text or images, use `Columns`. For an example in Google Chat apps, see [Grid](https://developers.google.com/chat/ui/widgets/grid). A grid supports any number of columns and items. The number of rows is determined by items divided by columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ``` # Displays a grid with a collection of items. A grid supports any number of columns and items. The number of rows is determined by the upper bounds of the number items divided by the number of columns. A grid with 10 items and 2 columns has 5 rows. A grid with 11 items and 2 columns has 6 rows. For example, the following JSON creates a 2 column grid with a single item: ``` "grid": { "title": "A fine collection of items", "columnCount": 2, "borderStyle": { "type": "STROKE", "cornerRadius": 4 }, "items": [ { "image": { "imageUri": "https://www.example.com/image.png", "cropStyle": { "type": "SQUARE" }, "borderStyle": { "type": "STROKE" } }, "title": "An item", "textAlignment": "CENTER" } ], "onClick": { "openLink": { "url": "https://www.example.com" } } } ```
                  "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to each grid item.
                    "cornerRadius": 42, # The corner radius for the border.
                    "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                      "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                      "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                      "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                      "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                    },
                    "type": "A String", # The border type.
                  },
                  "columnCount": 42, # The number of columns to display in the grid. A default value is used if this field isn't specified, and that default value is different depending on where the grid is shown (dialog versus companion).
                  "items": [ # The items to display in the grid.
                    { # Represents an item in a grid layout. Items can contain text, an image, or both text and an image.
                      "id": "A String", # A user-specified identifier for this grid item. This identifier is returned in the parent grid's `onClick` callback parameters.
                      "image": { # Represents an image. # The image that displays in the grid item.
                        "altText": "A String", # The accessibility label for the image.
                        "borderStyle": { # The style options for the border of a card or widget, including the border type and color. # The border style to apply to the image.
                          "cornerRadius": 42, # The corner radius for the border.
                          "strokeColor": { # Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and from color representations in various languages over compactness. For example, the fields of this representation can be trivially provided to the constructor of `java.awt.Color` in Java; it can also be trivially provided to UIColor's `+colorWithRed:green:blue:alpha` method in iOS; and, with just a little work, it can be easily formatted into a CSS `rgba()` string in JavaScript. This reference page doesn't have information about the absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided, implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha values each differ by at most `1e-5`. Example (Java): import com.google.type.Color; // ... public static java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ? protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(), protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float) color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator = 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green / denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha( FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); } // ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red, green, blue, alpha; if (![color getRed:&red green:&green blue:&blue alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): // ... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac = rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green = Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green, blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red, green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return resultBuilder.join(''); }; // ... # The colors to use when the type is `BORDER_TYPE_STROKE`.
                            "alpha": 3.14, # The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation: `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)` This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).
                            "blue": 3.14, # The amount of blue in the color as a value in the interval [0, 1].
                            "green": 3.14, # The amount of green in the color as a value in the interval [0, 1].
                            "red": 3.14, # The amount of red in the color as a value in the interval [0, 1].
                          },
                          "type": "A String", # The border type.
                        },
                        "cropStyle": { # Represents the crop style applied to an image. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ``` # The crop style to apply to the image.
                          "aspectRatio": 3.14, # The aspect ratio to use if the crop type is `RECTANGLE_CUSTOM`. For example, here's how to apply a 16:9 aspect ratio: ``` cropStyle { "type": "RECTANGLE_CUSTOM", "aspectRatio": 16/9 } ```
                          "type": "A String", # The crop type.
                        },
                        "imageUri": "A String", # The image URL.
                      },
                      "layout": "A String", # The layout to use for the grid item.
                      "subtitle": "A String", # The grid item's subtitle.
                      "title": "A String", # The grid item's title.
                    },
                  ],
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # This callback is reused by each individual grid item, but with the item's identifier and index in the items list added to the callback's parameters.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                  "title": "A String", # The text that displays in the grid header.
                },
                "horizontalAlignment": "A String", # Specifies whether widgets align to the left, right, or center of a column.
                "image": { # An image that is specified by a URL and can have an `onClick` action. For an example, see [Image](https://developers.google.com/chat/ui/widgets/image). # Displays an image. For example, the following JSON creates an image with alternative text: ``` "image": { "imageUrl": "https://developers.google.com/chat/images/quickstart-app-avatar.png", "altText": "Chat app avatar" } ```
                  "altText": "A String", # The alternative text of this image that's used for accessibility.
                  "imageUrl": "A String", # The HTTPS URL that hosts the image. For example: ``` https://developers.google.com/chat/images/quickstart-app-avatar.png ```
                  "onClick": { # Represents how to respond when users click an interactive element on a card, such as a button. # When a user clicks the image, the click triggers this action.
                    "action": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, an action is triggered by this `onClick`.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "card": # Object with schema name: GoogleAppsCardV1Card # A new card is pushed to the card stack after clicking if specified. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "openDynamicLinkAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An add-on triggers this action when the action needs to open a link. This differs from the `open_link` above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.
                      "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                      "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                      "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                      "parameters": [ # List of action parameters.
                        { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                          "key": "A String", # The name of the parameter for the action script.
                          "value": "A String", # The value of the parameter.
                        },
                      ],
                      "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                    },
                    "openLink": { # Represents an `onClick` event that opens a hyperlink. # If specified, this `onClick` triggers an open link action.
                      "onClose": "A String", # Whether the client forgets about a link after opening it, or observes it until the window closes. Not supported by Chat apps.
                      "openAs": "A String", # How to open a link. Not supported by Chat apps.
                      "url": "A String", # The URL to open.
                    },
                  },
                },
                "selectionInput": { # A widget that creates one or more UI items that users can select. For example, a dropdown menu or checkboxes. You can use this widget to collect data that can be predicted or enumerated. For an example in Google Chat apps, see [Selection input](https://developers.google.com/chat/ui/widgets/selection-input). Chat apps can process the value of items that users select or input. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). To collect undefined or abstract data from users, use the TextInput widget. # Displays a selection control that lets users select items. Selection controls can be checkboxes, radio buttons, switches, or dropdown menus. For example, the following JSON creates a dropdown menu that lets users choose a size: ``` "selectionInput": { "name": "size", "label": "Size" "type": "DROPDOWN", "items": [ { "text": "S", "value": "small", "selected": false }, { "text": "M", "value": "medium", "selected": true }, { "text": "L", "value": "large", "selected": false }, { "text": "XL", "value": "extra_large", "selected": false } ] } ```
                  "externalDataSource": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # An external data source, such as a relational data base. [Developer Preview](https://developers.google.com/workspace/preview).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "items": [ # An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
                    { # An item that users can select in a selection input, such as a checkbox or switch.
                      "bottomText": "A String", # For multi-select menus, a text description or label that's displayed below the item's `text` field. [Developer Preview](https://developers.google.com/workspace/preview).
                      "selected": True or False, # Whether the item is selected by default. If the selection input only accepts one value (such as for radio buttons or a dropdown menu), only set this field for one item.
                      "startIconUri": "A String", # For multi-select menus, the URL for the icon displayed next to the item's `text` field. Supports PNG and JPEG files. Must be an `HTTPS` URL. For example, `https://developers.google.com/chat/images/quickstart-app-avatar.png`. [Developer Preview](https://developers.google.com/workspace/preview).
                      "text": "A String", # The text that identifies or describes the item to users.
                      "value": "A String", # The value associated with this item. The client should use this as a form input value. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    },
                  ],
                  "label": "A String", # The text that appears above the selection input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if users are selecting the urgency of a work ticket from a drop-down menu, the label might be "Urgency" or "Select urgency".
                  "multiSelectMaxSelectedItems": 42, # For multi-select menus, the maximum number of items that a user can select. Minimum value is 1 item. If unspecified, set to 3 items. [Developer Preview](https://developers.google.com/workspace/preview).
                  "multiSelectMinQueryLength": 42, # For multi-select menus, the number of text characters that a user inputs before the Chat app queries autocomplete and displays suggested items on the card. If unspecified, set to 0 characters for static data sources and 3 characters for external data sources. [Developer Preview](https://developers.google.com/workspace/preview).
                  "name": "A String", # The name that identifies the selection input in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # If specified, the form is submitted when the selection changes. If not specified, you must specify a separate button that submits the form. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "platformDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, the data from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). Used to populate the items in the multi-select menu. [Developer Preview](https://developers.google.com/workspace/preview). # A data source from a [Google Workspace host application](https://developers.google.com/chat/api/reference/rest/v1/HostApp). [Developer Preview](https://developers.google.com/workspace/preview).
                    "commonDataSource": "A String", # For a `SelectionInput` widget that uses a multi-select menu, a data source shared by all Google Workspace host applications, such as users in a Google Workspace organization. [Developer Preview](https://developers.google.com/workspace/preview).
                    "hostAppDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from a Google Workspace host application. [Developer Preview](https://developers.google.com/workspace/preview). # A data source that's unique to a Google Workspace host application, such as Gmail emails, Google Calendar events, or Google Chat messages. [Developer Preview](https://developers.google.com/workspace/preview).
                      "chatDataSource": { # Chat apps only. For a `SelectionInput` widget that uses a multi-select menu, a data source from Google Chat. For example, a list of Google Chat spaces of which the user is a member. [Developer Preview](https://developers.google.com/workspace/preview). # The data source is Google Chat. [Developer Preview](https://developers.google.com/workspace/preview).
                        "spaceDataSource": { # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview). # A data source representing a Google Chat space. Format: spaces/{space} [Developer Preview](https://developers.google.com/workspace/preview).
                          "defaultToCurrentSpace": True or False, # When `true`, uses the card's Google Chat space as the default selection. The default value is `false`. [Developer Preview](https://developers.google.com/workspace/preview).
                        },
                      },
                    },
                  },
                  "type": "A String", # The type of items that are displayed to users in a `SelectionInput` widget. Selection types support different types of interactions. For example, users can select one or more checkboxes, but they can only select one value from a dropdown menu.
                },
                "textInput": { # A field in which users can enter text. Supports suggestions and on-change actions. For an example in Google Chat apps, see [Text input](https://developers.google.com/chat/ui/widgets/text-input). Chat apps receive and can process the value of entered text during form input events. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data). When you need to collect undefined or abstract data from users, use a text input. To collect defined or enumerated data from users, use the SelectionInput widget. # Displays a text box that users can type into. For example, the following JSON creates a text input for an email address: ``` "textInput": { "name": "mailing_address", "label": "Mailing Address" } ``` As another example, the following JSON creates a text input for a programming language with static suggestions: ``` "textInput": { "name": "preferred_programing_language", "label": "Preferred Language", "initialSuggestions": { "items": [ { "text": "C++" }, { "text": "Java" }, { "text": "JavaScript" }, { "text": "Python" } ] } } ```
                  "autoCompleteAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # Optional. Specify what action to take when the text input field provides suggestions to users who interact with it. If unspecified, the suggestions are set by `initialSuggestions` and are processed by the client. If specified, the app takes the action specified here, such as running a custom function. Supported by Google Workspace Add-ons, but not Google Chat apps.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "hintText": "A String", # Text that appears below the text input field meant to assist users by prompting them to enter a certain value. This text is always visible. Required if `label` is unspecified. Otherwise, optional.
                  "initialSuggestions": { # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`. # Suggested values that users can enter. These values appear when users click inside the text input field. As users type, the suggested values dynamically filter to match what the users have typed. For example, a text input field for programming language might suggest Java, JavaScript, Python, and C++. When users start typing `Jav`, the list of suggestions filters to show just `Java` and `JavaScript`. Suggested values help guide users to enter values that your app can make sense of. When referring to JavaScript, some users might enter `javascript` and others `java script`. Suggesting `JavaScript` can standardize how users interact with your app. When specified, `TextInput.type` is always `SINGLE_LINE`, even if it's set to `MULTIPLE_LINE`.
                    "items": [ # A list of suggestions used for autocomplete recommendations in text input fields.
                      { # One suggested value that users can enter in a text input field.
                        "text": "A String", # The value of a suggested input to a text input field. This is equivalent to what users enter themselves.
                      },
                    ],
                  },
                  "label": "A String", # The text that appears above the text input field in the user interface. Specify text that helps the user enter the information your app needs. For example, if you are asking someone's name, but specifically need their surname, write `surname` instead of `name`. Required if `hintText` is unspecified. Otherwise, optional.
                  "name": "A String", # The name by which the text input is identified in a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                  "onChangeAction": { # An action that describes the behavior when the form is submitted. For example, you can invoke an Apps Script script to handle the form. If the action is triggered, the form values are sent to the server. # What to do when a change occurs in the text input field. For example, a user adding to the field or deleting text. Examples of actions to take include running a custom function or opening a [dialog](https://developers.google.com/chat/how-tos/dialogs) in Google Chat.
                    "function": "A String", # A custom function to invoke when the containing element is clicked or othrwise activated. For example usage, see [Create interactive cards](https://developers.google.com/chat/how-tos/cards-onclick).
                    "interaction": "A String", # Optional. Required when opening a [dialog](https://developers.google.com/chat/how-tos/dialogs). What to do in response to an interaction with a user, such as a user clicking a button in a card message. If unspecified, the app responds by executing an `action`—like opening a link or running a function—as normal. By specifying an `interaction`, the app can respond in special interactive ways. For example, by setting `interaction` to `OPEN_DIALOG`, the app can open a [dialog](https://developers.google.com/chat/how-tos/dialogs). When specified, a loading indicator isn't shown. Supported by Chat apps, but not Google Workspace Add-ons. If specified for an add-on, the entire card is stripped and nothing is shown in the client.
                    "loadIndicator": "A String", # Specifies the loading indicator that the action displays while making the call to the action.
                    "parameters": [ # List of action parameters.
                      { # List of string parameters to supply when the action method is invoked. For example, consider three snooze buttons: snooze now, snooze one day, or snooze next week. You might use `action method = snooze()`, passing the snooze type and snooze time in the list of string parameters. To learn more, see [`CommonEventObject`](https://developers.google.com/chat/api/reference/rest/v1/Event#commoneventobject).
                        "key": "A String", # The name of the parameter for the action script.
                        "value": "A String", # The value of the parameter.
                      },
                    ],
                    "persistValues": True or False, # Indicates whether form values persist after the action. The default value is `false`. If `true`, form values remain after the action is triggered. To let the user make changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `NONE`. For [card messages](https://developers.google.com/chat/api/guides/message-formats/cards) in Chat apps, you must also set the action's [`ResponseType`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#responsetype) to `UPDATE_MESSAGE` and use the same [`card_id`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages#CardWithId) from the card that contained the action. If `false`, the form values are cleared when the action is triggered. To prevent the user from making changes while the action is being processed, set [`LoadIndicator`](https://developers.google.com/workspace/add-ons/reference/rpc/google.apps.card.v1#loadindicator) to `SPINNER`.
                  },
                  "type": "A String", # How a text input field appears in the user interface. For example, whether the field is single or multi-line.
                  "value": "A String", # The value entered by a user, returned as part of a form input event. For details about working with form inputs, see [Receive form data](https://developers.google.com/chat/ui/read-form-data).
                },
                "textParagraph": { # A paragraph of text that supports formatting. For an example in Google Chat apps, see [Text paragraph](https://developers.google.com/chat/ui/widgets/text-paragraph). For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards##card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). # Displays a text paragraph. Supports simple HTML formatted text. For more information about formatting text, see [Formatting text in Google Chat apps](https://developers.google.com/chat/api/guides/message-formats/cards#card-formatting) and [Formatting text in Google Workspace Add-ons](https://developers.google.com/apps-script/add-ons/concepts/widgets#text_formatting). For example, the following JSON creates a bolded text: ``` "textParagraph": { "text": " *bold text*" } ```
                  "text": "A String", # The text that's shown in the widget.
                },
              },
            ],
          },
        ],
      },
      "cardId": "A String", # Required if the message contains multiple cards. A unique identifier for a card in a message.
    },
  ],
  "clientAssignedMessageId": "A String", # A custom name for a Chat message assigned at creation. Must start with `client-` and contain only lowercase letters, numbers, and hyphens up to 63 characters in length. Specify this field to get, update, or delete the message with the specified value. Assigning a custom name lets a Chat app recall the message without saving the message `name` from the [response body](/chat/api/reference/rest/v1/spaces.messages/get#response-body) returned when creating the message. Assigning a custom name doesn't replace the generated `name` field, the message's resource name. Instead, it sets the custom name as the `clientAssignedMessageId` field, which you can reference while processing later operations, like updating or deleting the message. For example usage, see [Name a created message](https://developers.google.com/chat/api/guides/v1/messages/create#name_a_created_message).
  "createTime": "A String", # For spaces created in Chat, the time at which the message was created. This field is output only, except when used in imported spaces. [Developer Preview](https://developers.google.com/workspace/preview): For imported spaces, set this field to the historical timestamp at which the message was created in the source in order to preserve the original creation time.
  "deleteTime": "A String", # Output only. The time at which the message was deleted in Google Chat. If the message is never deleted, this field is empty.
  "deletionMetadata": { # Information about a deleted message. A message is deleted when `delete_time` is set. # Output only. Information about a deleted message. A message is deleted when `delete_time` is set.
    "deletionType": "A String", # Indicates who deleted the message.
  },
  "emojiReactionSummaries": [ # Output only. The list of emoji reaction summaries on the message.
    { # The number of people who reacted to a message with a specific emoji.
      "emoji": { # An emoji that is used as a reaction to a message. # Emoji associated with the reactions.
        "customEmoji": { # Represents a custom emoji. # Output only. A custom emoji.
          "uid": "A String", # Unique key for the custom emoji resource.
        },
        "unicode": "A String", # A basic emoji represented by a unicode string.
      },
      "reactionCount": 42, # The total number of reactions using the associated emoji.
    },
  ],
  "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards can't be displayed—for example, mobile notifications.
  "lastUpdateTime": "A String", # Output only. The time at which the message was last edited by a user. If the message has never been edited, this field is empty.
  "matchedUrl": { # A matched URL in a Chat message. Chat apps can preview matched URLs. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links). # Output only. A URL in `spaces.messages.text` that matches a link preview pattern. For more information, see [Preview links](https://developers.google.com/chat/how-tos/preview-links).
    "url": "A String", # Output only. The URL that was matched.
  },
  "name": "A String", # Resource name in the form `spaces/*/messages/*`. Example: `spaces/AAAAAAAAAAA/messages/BBBBBBBBBBB.BBBBBBBBBBB`
  "quotedMessageMetadata": { # Information about a quoted message. # Output only. Information about a message that's quoted by a Google Chat user in a space. Google Chat users can quote a message to reply to it.
    "lastUpdateTime": "A String", # Output only. The timestamp when the quoted message was created or when the quoted message was last updated.
    "name": "A String", # Output only. Resource name of the quoted message. Format: `spaces/{space}/messages/{message}`
  },
  "sender": { # A user in Google Chat. When returned as an output from a request, if your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output for a `User` resource only populates the user's `name` and `type`. # Output only. The user who created the message. If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [user](https://developers.google.com/chat/api/reference/rest/v1/User) `name` and `type`.
    "displayName": "A String", # Output only. The user's display name.
    "domainId": "A String", # Unique identifier of the user's Google Workspace domain.
    "isAnonymous": True or False, # Output only. When `true`, the user is deleted or their profile is not visible.
    "name": "A String", # Resource name for a Google Chat user. Format: `users/{user}`. `users/app` can be used as an alias for the calling app bot user. For human users, `{user}` is the same user identifier as: - the `{person_id`} for the [Person](https://developers.google.com/people/api/rest/v1/people) in the People API, where the Person `resource_name` is `people/{person_id}`. For example, `users/123456789` in Chat API represents the same person as `people/123456789` in People API. - the `id` for a [user](https://developers.google.com/admin-sdk/directory/reference/rest/v1/users) in the Admin SDK Directory API.
    "type": "A String", # User type.
  },
  "slashCommand": { # A [slash command](https://developers.google.com/chat/how-tos/slash-commands) in Google Chat. # Output only. Slash command information, if applicable.
    "commandId": "A String", # The ID of the slash command invoked.
  },
  "space": { # A space in Google Chat. Spaces are conversations between two or more users or 1:1 messages between a user and a Chat app. # If your Chat app [authenticates as a user](https://developers.google.com/chat/api/guides/auth/users), the output populates the [space](https://developers.google.com/chat/api/reference/rest/v1/spaces) `name`.
    "adminInstalled": True or False, # Output only. Whether the Chat app was installed by a Google Workspace administrator. Administrators can install a Chat app for their domain, organizational unit, or a group of users. Administrators can only install Chat apps for direct messaging between users and the app. To support admin install, your app must feature direct messaging.
    "displayName": "A String", # The space's display name. Required when [creating a space](https://developers.google.com/chat/api/reference/rest/v1/spaces/create). If you receive the error message `ALREADY_EXISTS` when creating a space or updating the `displayName`, try a different `displayName`. An existing space within the Google Workspace organization might already use this display name. For direct messages, this field might be empty. Supports up to 128 characters.
    "externalUserAllowed": True or False, # Immutable. Whether this space permits any Google Chat user as a member. Input when creating a space in a Google Workspace organization. For Google Chat users that use a Google Account, omit this field when creating a space (By default, the space permits any Google Chat user). For existing spaces, this field is output only.
    "name": "A String", # Resource name of the space. Format: `spaces/{space}`
    "singleUserBotDm": True or False, # Optional. Whether the space is a DM between a Chat app and a single human.
    "spaceDetails": { # Details about the space including description and rules. # Details about the space including description and rules.
      "description": "A String", # Optional. A description of the space. For example, describe the space's discussion topic, functional purpose, or participants. Supports up to 150 characters.
      "guidelines": "A String", # Optional. The space's rules, expectations, and etiquette. Supports up to 5,000 characters.
    },
    "spaceHistoryState": "A String", # The message history state for messages and threads in this space.
    "spaceThreadingState": "A String", # Output only. The threading state in the Chat space.
    "spaceType": "A String", # The type of space. Required when creating a space or updating the space type of a space. Output only for other usage.
    "threaded": True or False, # Output only. Deprecated: Use `spaceThreadingState` instead. Whether messages are threaded in this space.
    "type": "A String", # Output only. Deprecated: Use `space_type` instead. The type of a space.
  },
  "text": "A String", # Plain-text body of the message. The first link to an image, video, or web page generates a [preview chip](https://developers.google.com/chat/how-tos/preview-links). You can also [@mention a Google Chat user](https://developers.google.com/chat/api/guides/message-formats/text#messages-@mention), or everyone in the space. To learn about creating text messages, see [Create a text message](https://developers.google.com/chat/api/guides/message-formats/text).
  "thread": { # A thread in a Google Chat space. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/v1/messages/create#create-message-thread). If you specify a thread when creating a message, you can set the [`messageReplyOption`](https://developers.google.com/chat/api/reference/rest/v1/spaces.messages/create#messagereplyoption) field to determine what happens if no matching thread is found. # The thread the message belongs to. For example usage, see [Start or reply to a message thread](https://developers.google.com/chat/api/guides/crudl/messages#start_or_reply_to_a_message_thread).
    "name": "A String", # Output only. Resource name of the thread. Example: `spaces/{space}/threads/{thread}`
    "threadKey": "A String", # Optional. Input for creating or updating a thread. Otherwise, output only. ID for the thread. Supports up to 4000 characters. This ID is unique to the Chat app that sets it. For example, if multiple Chat apps create a message using the same thread key, the messages are posted in different threads. To reply in a thread created by a person or another Chat app, specify the thread `name` field instead.
  },
  "threadReply": True or False, # Output only. When `true`, the message is a response in a reply thread. When `false`, the message is visible in the space's top-level conversation as either the first message of a thread or a message with no threaded replies. If the space doesn't support reply in threads, this field is always `false`.
}