Bukkit/Bukkit — pull request #564 by EdGruberman (2012-03-17 06:32:46+00:00)
Title: Added ability to get EventExecutor from RegisteredListener to allow individual EventExecutors to be identifiable and unregistered; BUKKIT-1192

This will allow a plugin developer to identify a specific EventExecutor in a RegisteredListener (from HandlerList.getRegisteredListeners) in order to unregister it independently from any other EventExecutors in the same Listener.

I believe this is binary compatible and should therefore be a non-breaking change.