private function createRequestLandedCost(LandedCostRequest $landedCostRequest)
    {
        $xml = new DOMDocument();
        $xml->formatOutput = true;

        $tradeabilityRequest = $xml->appendChild($xml->createElement('LandedCostRequest'));
        $tradeabilityRequest->setAttribute('xml:lang', 'en-US');

        $request = $tradeabilityRequest->appendChild($xml->createElement('Request'));

        $node = $xml->importNode($this->createTransactionNode(), true);
        $request->appendChild($node);

        $request->appendChild($xml->createElement('RequestAction', 'LandedCost'));

        if ($landedCostRequest->getQueryRequest() !== null) {
            $tradeabilityRequest->appendChild($landedCostRequest->getQueryRequest()->toNode($xml));
        }

        return $xml->saveXML();
    }