src/vs/workbench/contrib/notebook/browser/contrib/troubleshoot/layout.ts/TroubleshootController/_getItemsForCells
class TroubleshootController:	private _getItemsForCells(): INotebookDeltaCellStatusBarItems[] {
		const items: INotebookDeltaCellStatusBarItems[] = [];
		for (let i = 0; i < this._notebookEditor.getLength(); i++) {
			items.push({
				handle: i,
				items: [
					<INotebookCellStatusBarItem>{
						text: `index: ${i}`,
						alignment: CellStatusbarAlignment.Left,
						priority: Number.MAX_SAFE_INTEGER
					}
				]
			});
		}

		return items;
	}