public function onRequestBeforeSend(Event $event)
    {
        $request = $event['request'];
        if (!$request->getParams()->get('cookies.disable')) {
            $request->removeHeader('Cookie');
            // Find cookies that match this request
            foreach ($this->cookieJar->getMatchingCookies($request) as $cookie) {
                $request->addCookie($cookie->getName(), $cookie->getValue());
            }
        }
    }