function account_group_sync($account_id)
 {
     if ($this->map['group_type'] == 'db') {
         $db_map = new db_mapping();
         return $db_map->MAP_account_group_sync_db($account_id, $this);
     } elseif ($this->map['group_type'] == 'status') {
         $db_map = new db_mapping();
         return $db_map->MAP_account_group_sync_status($account_id, $this);
     } elseif ($this->map['group_type'] == 'db-status') {
         $db_map = new db_mapping();
         return $db_map->MAP_account_group_sync_db_status($account_id, $this);
     } else {
         return false;
     }
 }