/**
  * @param string $instanceName
  * @param string $channelName
  *
  * @throws \Propel\Runtime\Exception\PropelException
  */
 private function onChannelSeen($instanceName, $channelName)
 {
     if (ChannelQuery::create()->hasChannel($instanceName, $channelName)) {
         return;
     }
     $channel = new Channel();
     $channel->setInstanceName($instanceName)->setName($channelName);
     $channel->save();
     $this->logger->info('Stored new channel (instance: {instanceName}, name: {channelName})', ['instanceName' => $instanceName, 'channelName' => $channelName]);
 }