Stores the subscriber information to be used when the event fires.
Returns true if the fn and obj match this objects properties. Used by the unsubscribe method to match the right subscriber.
Additional arguments to propagate to the subscriber
Optional 'this' keyword for the listener
Custom events for a given fire transaction.
The callback that will be execute when the event fires This is wrapped by Y.rbind if obj was supplied.
Unique subscriber id
This listener only reacts to the event once