EventEmitterable

addListener(
   event, 
   listener, 
zone?): Promise<EventEmitterable<T>>

emit(
   event, 
   zone?, ...
args?): Promise<boolean>

listenerCount(event?): Promise<number>

listeners(event?): Promise<Listener[]>

off(
   event, 
   listener?, 
zone?): Promise<EventEmitterable<T>>

on(
   event, 
   listener, 
zone?): Promise<EventEmitterable<T>>

once(
   event, 
   listener, 
zone?): Promise<EventEmitterable<T>>

removeAllListeners(event?): Promise<EventEmitterable<T>>

removeListener(
   event, 
   listener, 
zone?): Promise<EventEmitterable<T>>