public static function deleteGroupAndContent($nids, $posts, &$context) {
    $results = [];
    // Load each node and delete it.
    foreach ($nids as $nid) {
      $node = Node::load($nid);
      $message = t('Delete @type "@title"', ['@type' => $node->getType(), '@title' => $node->getTitle()]);
      $results[] = $node->delete();
    }
    // Load each post and delete it.
    foreach ($posts as $post_id) {
      $post = Post::load($post_id);
      $message = t("Deleting @type\'s", ['@type' => $post->bundle()]);
      $results[] = $post->delete();
    }
    $context['message'] = $message;
    $context['results'] = $results;
  }