EventTarget.getEventListeners

Please add something like

sequence< EventListener> getEventListeners()

to EventTarget interface so as everyone can inspect and delete even 
third party added listeners. Nowadays is is necessary to use such clumsy 
constructions as 
http://stackoverflow.com/questions/446892/how-to-find-event-listeners-on-a-dom-node/6434924#6434924.

Thanks
Jakub Czerny