src/vs/workbench/contrib/preferences/browser/preferencesWidgets.ts/SearchWidget/constructor
class SearchWidget:	constructor(parent: HTMLElement, protected options: SearchOptions,
		@IContextViewService private readonly contextViewService: IContextViewService,
		@IInstantiationService protected instantiationService: IInstantiationService,
		@IThemeService private readonly themeService: IThemeService,
		@IContextKeyService private readonly contextKeyService: IContextKeyService,
		@IKeybindingService protected readonly keybindingService: IKeybindingService
	) {
		super();
		this.create(parent);
	}