public function ExpeledGroupList()
 {
     if (isset($this->_cache['ExpeledGroupList'])) {
         return $this->_cache['ExpeledGroupList'];
     }
     $list = $this->models->InstanceClass('GroupList');
     $rows = RecordBookQuery::ExpeledGroupList($this->db);
     while ($dd = $this->db->fetch_array($rows)) {
         $list->Add($this->models->InstanceClass('GroupItem', $dd));
     }
     return $this->_cache['ExpeledGroupList'] = $list;
 }