def unregister(registerable: Any):
listenable = registration_event_listenable_map[type(registerable)]<EOL>event = RegistrationEvent(registerable, RegistrationEvent.Type.UNREGISTERED)<EOL>listenable.notify_listeners(event)<EOL>
Unregisters an object, notifying any listeners that may be interested in it.
:param registerable: the object to unregister