eZ\Publish\Core\FieldType\RichText\Converter\Render\Template::saveNodeXML PHP Method

    protected function saveNodeXML(DOMNode $node)
    {
        $xmlString = '';
        /** @var \DOMNode $child */
        foreach ($node->childNodes as $child) {
            $xmlString .= $node->ownerDocument->saveXML($child);
        }
        return $xmlString;
    }