eZ\Publish\Core\MVC\Symfony\Routing\SimplifiedRequest::__sleep PHP Method

    public function __sleep()
    {
        // Clean up headers for serialization not have a too heavy string (i.e. for ESI/Hinclude tags).
        $this->headers = array();
        return array('scheme', 'host', 'port', 'pathinfo', 'queryParams', 'languages', 'headers');
    }