src/vs/workbench/browser/parts/views/viewPane.ts/ViewPane/getActionViewItem
class ViewPane:	getActionViewItem(action: IAction, options?: IDropdownMenuActionViewItemOptions): IActionViewItem | undefined {
		return createActionViewItem(this.instantiationService, action, { ...options, ...{ menuAsChild: action instanceof SubmenuItemAction } });
	}