##Activate entities
##activate deactivate entity line function start stop
##Use 'activate <entity>' to turn the entity line into a rectangle. You can also use the 'active' attribute of entities to turn this on or off.
hscale=auto;
C: Client;
S: Server;
B: Backend;
->C: Hit;
C=>S: Request to Server;
activate S;
S>>B: Internal Query;
S<<B: Internal Response;
C<=S: Reply from Server;
deactivate S;
