code: public function clientGetById($clid)
      {
          if (!array_key_exists((string)$clid, $this->clientList())) {
              throw new Ts3Exception("invalid clientID", 0x200);
          }
  
          return $this->clientList[intval((string)$clid)];
      }
docs: Returns the Client object matching the given ID.
  
  @param  integer $clid
  @throws Ts3Exception
  @return Client