src/vs/workbench/contrib/notebook/common/notebookEditorModelResolverServiceImpl.ts/NotebookModelReferenceCollection/dispose
class NotebookModelReferenceCollection:	dispose(): void {
		this._disposables.dispose();
		this._onDidSaveNotebook.dispose();
		this._onDidChangeDirty.dispose();
		dispose(this._modelListener.values());
		dispose(this._workingCopyManagers.values());
	}