src/vs/workbench/contrib/notebook/browser/contrib/cellStatusBar/executionStatusBarItemController.ts/TimerCellStatusBarItem/constructor
class TimerCellStatusBarItem:	constructor(
		private readonly _notebookViewModel: NotebookViewModel,
		private readonly _cell: ICellViewModel,
	) {
		super();

		this._scheduler = this._register(new RunOnceScheduler(() => this._update(), TimerCellStatusBarItem.UPDATE_INTERVAL));
		this._update();
		this._register(this._cell.model.onDidChangeInternalMetadata(() => this._update()));
	}