Ouzo\Session::has PHP Method

    public static function has()
    {
        return self::create()->has(func_get_args());
    }

 public static function getCsrfToken()
 {
     if (Session::has('csrftoken')) {
         return Session::get('csrftoken');
     }
     $token = self::generateCsrfToken();
     Session::set('csrftoken', $token);
     return $token;
 }