##Auto sizing and nested boxes
##auto size box nested dotted
##When you omit one or both of the entities from a box definition, they will be calculated based on the content of the box.
C: Client;
S: Server;
B: Backend;
->C: Hit;
box ..: Server query
{
    box C==C: Generate\nrequest;
    C=>S: Request;
    box S..B: Server gets info
    {
       S>>B: Query;
       S<<B: Response;
   };
   C<=S: Reply;
};

