Unregisters an event handler
Event to unregister from
Event handler function. If not passed in, it removes all event handlers.
Boolean indicating if the event handler was registered as a one-time event handler (Defaults to false)
Registers an event handler
Event to listen for
Event handler function
Registers an event handler that is only run once
Event to listen for
Event handler function
Entity that raises events that can be subscribed to
type