src/vs/workbench/browser/parts/compositeBar.ts/CompositeBar/showContextMenu
class CompositeBar:	private showContextMenu(e: MouseEvent | GestureEvent): void {
		EventHelper.stop(e, true);

		const event = new StandardMouseEvent(e);
		this.contextMenuService.showContextMenu({
			getAnchor: () => { return { x: event.posx, y: event.posy }; },
			getActions: () => this.getContextMenuActions(e)
		});
	}