private function loadChannelCode($channelId) {
     $channel = new Pap_Db_Channel();
     $channel->setId($channelId);
     try {
         $channel->load();
     } catch (Gpf_Exception $e) {
         return $channelId;
     }
     return $channel->getValue();
 }
 /**
  * @return Pap_Db_Channel
  */
 protected function getChannelById($channelId) {
     $channel = new Pap_Db_Channel();
     $channel->setId($channelId);
     try {
         $channel->load();
         return $channel;
     } catch (Gpf_Exception $e) {
         return null;
     }
 }