Is there any examples of activity event MessageThrow/MessageCatch and SignalThrow/SignalCatch? In practical project applications, message queues are needed? How should developers implement interaction between processes? I can only see a process file in the example process data.

Is there any examples of activity event MessageThrow/MessageCatch and SignalThrow/SignalCatch? In practical project applications, message queues are needed? How should developers implement interaction between processes? I can only see a process file in the example process data.