src/vs/workbench/contrib/extensions/browser/extensionsActions.ts/ExtensionActionWithDropdownActionViewItem/constructor
class ExtensionActionWithDropdownActionViewItem:	constructor(
		action: ActionWithDropDownAction,
		options: IActionViewItemOptions & IActionWithDropdownActionViewItemOptions,
		contextMenuProvider: IContextMenuProvider
	) {
		super(null, action, options, contextMenuProvider);
	}