public function channelGroupGetById($cgid)
  {
    if(!array_key_exists((string) $cgid, $this->channelGroupList()))
    {
      throw new \ManiaLivePlugins\Standard\TeamSpeak\TeamSpeak3\Adapter\ServerQuery\Exception("invalid groupID", 0xA00);
    }

    return $this->cgroupList[intval((string) $cgid)];
  }