src/vs/base/browser/touch.ts/Gesture/newGestureEvent
class Gesture:	private newGestureEvent(type: string, initialTarget?: EventTarget): GestureEvent {
		const event = document.createEvent('CustomEvent') as unknown as GestureEvent;
		event.initEvent(type, false, true);
		event.initialTarget = initialTarget;
		event.tapCount = 0;
		return event;
	}