src/vs/base/browser/ui/dropdown/dropdown.ts/DropdownMenu/show
class DropdownMenu:	override show(): void {
		super.show();

		this.element.classList.add('active');

		this._contextMenuProvider.showContextMenu({
			getAnchor: () => this.element,
			getActions: () => this.actions,
			getActionsContext: () => this.menuOptions ? this.menuOptions.context : null,
			getActionViewItem: action => this.menuOptions && this.menuOptions.actionViewItemProvider ? this.menuOptions.actionViewItemProvider(action) : undefined,
			getKeyBinding: action => this.menuOptions && this.menuOptions.getKeyBinding ? this.menuOptions.getKeyBinding(action) : undefined,
			getMenuClassName: () => this.menuClassName,
			onHide: () => this.onHide(),
			actionRunner: this.menuOptions ? this.menuOptions.actionRunner : undefined,
			anchorAlignment: this.menuOptions ? this.menuOptions.anchorAlignment : AnchorAlignment.LEFT,
			domForShadowRoot: this.menuAsChild ? this.element : undefined
		});
	}