src/vs/workbench/contrib/notebook/browser/contrib/outline/notebookOutline.ts/NotebookOutlineCreator/constructor
class NotebookOutlineCreator:	constructor(
		@IOutlineService outlineService: IOutlineService,
		@IInstantiationService private readonly _instantiationService: IInstantiationService,
	) {
		const reg = outlineService.registerOutlineCreator(this);
		this.dispose = () => reg.dispose();
	}