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

    return $this->sgroupList[intval((string) $sgid)];
  }