+ $group = new User_group();
+ $group->id = $this->group_id;
+ $group->find(true);
+ if (!$group instanceof User_group) {
+ common_log(LOG_ERR, 'User_group does not exist for Local_group: '.$this->group_id);
+ throw new NoSuchGroupException(array('id' => $this->group_id));
+ }
+ return $group;