protected function load()
    {
        if (!isset($_SESSION[$this->sessionKey])) {
            return;
        }
        $data = json_decode($_SESSION[$this->sessionKey], true);
        if (is_array($data)) {
            foreach ($data as $cookie) {
                $this->setCookie(new SetCookie($cookie));
            }
        } elseif (strlen($data)) {
            throw new \RuntimeException("Invalid cookie data");
        }
    }