src/vs/base/browser/ui/list/listView.ts/ListView/toGestureEvent
class ListView:	private toGestureEvent(browserEvent: GestureEvent): IListGestureEvent<T> {
		const index = this.getItemIndexFromEventTarget(browserEvent.initialTarget || null);
		const item = typeof index === 'undefined' ? undefined : this.items[index];
		const element = item && item.element;
		return { browserEvent, index, element };
	}