Curl\Curl::setReferrer PHP Method

    public function setReferrer($referrer)
    {
        $this->setOpt(CURLOPT_REFERER, $referrer);
    }

 private function connect()
 {
     $curl = new Curl();
     $curl->setBasicAuthentication($this->adminUsername, $this->adminPassword);
     $curl->setUserAgent('');
     $curl->setReferrer('');
     $curl->setHeader('X-Requested-With', 'XMLHttpRequest');
     $this->curl = $curl;
 }