public function consumer($url, $key, $secret)
    {
        Argument::i()
            //argument 1 must be a string
            ->test(1, 'string')
            //argument 2 must be a string
            ->test(2, 'string')
            //argument 3 must be a string
            ->test(3, 'string');
            
        return Consumer::i($url, $key, $secret);
    }