Other actors may send messages to this owner by calling put(), and the owner
receives them by calling get(). The put() call is therefore effectively
shared and the get() call is effectively local. setMaxMsgs may be used by
any actor to limit the size of the message queue.
A MessageBox is a message queue for one actor.
Other actors may send messages to this owner by calling put(), and the owner receives them by calling get(). The put() call is therefore effectively shared and the get() call is effectively local. setMaxMsgs may be used by any actor to limit the size of the message queue.