BaiduStore::__construct PHP Method

    public function __construct($clientId)
    {
        $this->clientId = $clientId;
    }

 /**
  * @param string   $clientId
  * @param Memcache $memcache
  */
 public function __construct($clientId, $memcache, $sessionId)
 {
     $this->memcache = $memcache;
     $this->sessionId = $sessionId;
     parent::__construct($clientId);
 }