src/vs/workbench/contrib/extensions/browser/extensionsActions.ts/DropDownMenuActionViewItem/showMenu
class DropDownMenuActionViewItem:	public showMenu(menuActionGroups: IAction[][], disposeActionsOnHide: boolean): void {
		if (this.element) {
			const actions = this.getActions(menuActionGroups);
			let elementPosition = DOM.getDomNodePagePosition(this.element);
			const anchor = { x: elementPosition.left, y: elementPosition.top + elementPosition.height + 10 };
			this.contextMenuService.showContextMenu({
				getAnchor: () => anchor,
				getActions: () => actions,
				actionRunner: this.actionRunner,
				onHide: () => { if (disposeActionsOnHide) { dispose(actions); } }
			});
		}
	}