/**
  * Add the specified user to the specified group.
  *
  * @param int $userId
  * @param int $groupId
  * @return GalleryStatus a status code
  */
 function addUserToGroup($userId, $groupId) {
 MyOOS_CoreApi::requireOnce(
     'modules/core/classes/helpers/GalleryUserGroupHelper_medium.class');
 return GalleryUserGroupHelper_medium::addUserToGroup($userId, $groupId);
 }