src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts/NotebookEditorWidget/_cellFocusAria
class NotebookEditorWidget:	private _cellFocusAria(cell: ICellViewModel, focusItem: 'editor' | 'container' | 'output') {
		const index = this._notebookViewModel?.getCellIndex(cell);

		if (index !== undefined && index >= 0) {
			let position = '';
			switch (focusItem) {
				case 'editor':
					position = `the inner ${cell.cellKind === CellKind.Markup ? 'markdown' : 'code'} editor is focused, press escape to focus the cell container`;
					break;
				case 'output':
					position = `the cell output is focused, press escape to focus the cell container`;
					break;
				case 'container':
					position = `the ${cell.cellKind === CellKind.Markup ? 'markdown preview' : 'cell container'} is focused, press enter to focus the inner ${cell.cellKind === CellKind.Markup ? 'markdown' : 'code'} editor`;
					break;
				default:
					break;
			}
			aria.alert(`Cell ${this._notebookViewModel?.getCellIndex(cell)}, ${position} `);
		}
	}