public function getRefund(CardPayments\Refund $refund)
    {
        $refund->setRequiredFields(array('id'));
        $refund->checkRequiredFields();

        $request = new Request(array(
             'method' => Request::GET,
             'uri' => $this->prepareURI("/refunds/" . $refund->id)
        ));

        $response = $this->client->processRequest($request);
        return new CardPayments\Refund($response);
    }