emit
emit: (<T>(data?: T) => void) getListeners
getListeners: (() => Function[])
listenerCount
listenerCount: (() => number)
off
off: (<T>(listener: EventListener<T>) => void) on
on: (<T>(listener: EventListener<T>) => void) once
once: (<T>(listener: EventListener<T>) => void) removeAllListeners
removeAllListeners: (() => void)
Interface representing the event handler object.