src/vs/workbench/contrib/notebook/browser/contrib/find/findModel.ts/FindModel/_registerModelListener
class FindModel:	private _registerModelListener(notebookTextModel?: NotebookTextModel) {
		this._modelDisposable.clear();

		if (notebookTextModel) {
			this._modelDisposable.add(notebookTextModel.onDidChangeContent((e) => {
				if (!e.rawEvents.some(event => event.kind === NotebookCellsChangeType.ChangeCellContent || event.kind === NotebookCellsChangeType.ModelChange)) {
					return;
				}

				this.research();
			}));
		}

		this.research();
	}