src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts/NotebookEditorWidget/focusEditor
class NotebookEditorWidget:	private focusEditor(activeElement: CellViewModel): void {
		for (const [element, editor] of this._renderedEditors.entries()) {
			if (element === activeElement) {
				editor.focus();
				return;
			}
		}
	}