src/vs/workbench/browser/composite.ts/Composite/constructor
class Composite:	constructor(
		id: string,
		telemetryService: ITelemetryService,
		themeService: IThemeService,
		storageService: IStorageService
	) {
		super(id, themeService, storageService);

		this._telemetryService = telemetryService;
		this.visible = false;
	}