Method fireEventAsync

packages/base/src/EventProvider.ts:67–69

* Fires an event and returns a promise that will resolve once all listeners have resolved. * * @param eventName the event to fire * @param data optional data to pass to each event listener * @returns {Promise} a promise that will resolve when all listeners have resolved

(eventName: string, data: EventListenerParam)

	 * @returns {Promise} a promise that will resolve when all listeners have resolved
	 */
	fireEventAsync(eventName: string, data: EventListenerParam) {
		return Promise.all(this.fireEvent(eventName, data));
	}

	isHandlerAttached(eventName: string, fnFunction: (param: EventListenerParam) => EventListenerReturn) {
		const eventRegistry = this._eventRegistry;