public function twitter($title, $site, $description, $image = null, $card = 'summary')
    {
        $this->meta('twitter:card', $card);
        $this->meta('twitter:site', $site);
        $this->meta('twitter:title', $title);
        $this->meta('twitter:description', $description);
        $this->meta('twitter:card', $title);

        if (!is_null($image)) {
            $this->meta('twitter:image', $image);
        }
    }