public function save()
    {
        $input              = Input::all();
        $session            = app('request')->session();
        $classname          = array_get($input, 'classname');
        $key                = uri();
        $params             = $session->get($key);
        $params[$classname] = array_get($input, 'params');
        $session->put($key, $params);
        $session->save();
        return response(app($classname)->sidebar($params[$classname]), 200);
    }