src/vs/workbench/contrib/notebook/browser/contrib/editorStatusBar/editorStatusBar.ts/ActiveCellStatus/_show
class ActiveCellStatus:	private _show(editor: INotebookEditor) {
		const vm = editor.viewModel;
		if (!vm) {
			this._accessor.clear();
			return;
		}

		const newText = this._getSelectionsText(editor, vm);
		if (!newText) {
			this._accessor.clear();
			return;
		}

		const entry = { name: nls.localize('notebook.activeCellStatusName', "Notebook Editor Selections"), text: newText, ariaLabel: newText };
		if (!this._accessor.value) {
			this._accessor.value = this._statusbarService.addEntry(
				entry,
				'notebook.activeCellStatus',
				StatusbarAlignment.RIGHT,
				100
			);
		} else {
			this._accessor.value.update(entry);
		}
	}