public function getRefundDetails($amazonRefundId)
    {
        $getRefundDetailsRequest 
            = new OffAmazonPaymentsService_Model_GetRefundDetailsRequest();
        $getRefundDetailsRequest->setSellerId($this->_sellerId);
        $getRefundDetailsRequest->setAmazonRefundId($amazonRefundId);
        return $this->_service->getRefundDetails($getRefundDetailsRequest);
    }