private function _waitUntilRefundProcessingIsCompleted($amazonRefundReferenceId)
    {
        $response = $this->callStepAndCheckForException(
            'waitUntilRefundProcessingIsCompleted',
            array($amazonRefundReferenceId)
        );
       
        printGetRefundDetailsResponse($response);
        validateThatRefundIsCompleted($response->getGetRefundDetailsResult()->getRefundDetails());
    }