src/vs/workbench/contrib/notebook/browser/services/notebookExecutionStateServiceImpl.ts/NotebookExecutionStateService/dispose
class NotebookExecutionStateService:	override dispose(): void {
		super.dispose();
		this._executions.forEach(executionMap => {
			executionMap.forEach(execution => execution.dispose());
			executionMap.clear();
		});
		this._executions.clear();

		this._cellListeners.forEach(disposable => disposable.dispose());
		this._notebookListeners.forEach(disposable => disposable.dispose());
		this._lastFailedCells.forEach(elem => elem.disposable.dispose());
	}