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