src/vs/workbench/contrib/notebook/browser/contrib/troubleshoot/layout.ts/TroubleshootController/constructor
class TroubleshootController:	constructor(private readonly _notebookEditor: INotebookEditor) {
		super();

		this._register(this._notebookEditor.onDidChangeModel(() => {
			this._update();
		}));

		this._update();
	}