src/vs/platform/browser/contextScopedHistoryWidget.ts/ContextScopedHistoryInputBox/constructor
class ContextScopedHistoryInputBox:	constructor(container: HTMLElement, contextViewProvider: IContextViewProvider | undefined, options: IHistoryInputOptions,
		@IContextKeyService contextKeyService: IContextKeyService
	) {
		super(container, contextViewProvider, options);
		this._register(createAndBindHistoryNavigationWidgetScopedContextKeyService(contextKeyService, <IContextScopedHistoryNavigationWidget>{ target: this.element, historyNavigator: this }).scopedContextKeyService);
	}