Copy field groups when setting up private registration fields

When i have configured field groups on a node_registration content type. The field groups are not copied when setting up private fields for a registration node.

This will provide this functionality.

  // Copy field groups.
  if (module_exists('field_group')) {
    $modes = field_group_info_groups('node_registration', 'workshop');
    foreach ($modes as $key => $groups) {
      foreach($groups as $group) {
        $new_group = clone $group;
        $new_group->bundle = $bundle;
        $new_group->identifier = $new_group->group_name . '|' . $new_group->entity_type . '|' . $new_group->bundle . '|' . $new_group->mode;
        unset($new_group->id);
        unset($new_group->export_type);
        field_group_group_save($new_group);
      }
    }
  }