/// Send a message to a view controller.
Send a message to a view controller.
Send a message to a view controller .
pub fn queue_message(&self, target: ViewKey, message: Message) {
        self.sender
            .unbounded_send(MessageInternal::TargetedMessage(target, message))
            .expect("AppContext::queue_message - unbounded_send");
    }
pub fn queue_message ( & self , target : ViewKey , message : Message ) { self . sender . unbounded_send ( MessageInternal :: TargetedMessage ( target , message ) ) . expect ( " " ) ; }
Send a message to a view controller.
Send a message to a view controller .
&self
target
ViewKey
message
Message