public function cancelOrderReference()
    {
        $cancelOrderReferenceRequest 
            = new OffAmazonPaymentsService_Model_CancelOrderReferenceRequest();
        $cancelOrderReferenceRequest->setSellerId($this->_sellerId);
        $cancelOrderReferenceRequest
            ->setAmazonOrderReferenceId($this->_amazonOrderReferenceId);
        
        return $this->_service->cancelOrderReference($cancelOrderReferenceRequest);
    }