$row += $element['#options'][$key]['#attributes'];
}
// Render the checkbox / radio element.
- $row['data'][] = drupal_render($element[$key]);
+ $row['data'][] = \Drupal::service('renderer')->render($element[$key]);
// As table.html.twig only maps header and row columns by order, create
// the correct order by iterating over the header fields.