private function _convertCreateShipment($request) {

        $parameters = array();
        $parameters['Action'] = 'CreateShipment';
        if ($request->isSetSellerId()) {
            $parameters['SellerId'] =  $request->getSellerId();
        }
        if ($request->isSetMWSAuthToken()) {
            $parameters['MWSAuthToken'] =  $request->getMWSAuthToken();
        }
        if ($request->isSetShipmentRequestDetails()) {
            $ShipmentRequestDetailsCreateShipmentRequest = $request->getShipmentRequestDetails();
            foreach  ($ShipmentRequestDetailsCreateShipmentRequest->getAmazonOrderId() as $AmazonOrderIdShipmentRequestDetailsIndex => $AmazonOrderIdShipmentRequestDetails) {
                $parameters['ShipmentRequestDetails' . '.' . 'AmazonOrderId' . '.'  . ($AmazonOrderIdShipmentRequestDetailsIndex + 1)] =  $AmazonOrderIdShipmentRequestDetails;
            }
        }
        if ($request->isSetShippingServiceId()) {
            $parameters['ShippingServiceId'] =  $request->getShippingServiceId();
        }
        if ($request->isSetShippingServiceOfferId()) {
            $parameters['ShippingServiceOfferId'] =  $request->getShippingServiceOfferId();
        }

        return $parameters;
    }