public static function createDocumentFromNode(\DOMNode $node, $docOptions = 0)
    {
        $xmldoc = self::createXmlDocument($docOptions);
        XmlUtil::$xmlNsPrefix[spl_object_hash($xmldoc)] = array();
        $root = $xmldoc->importNode($node, true);
        $xmldoc->appendChild($root);
        return $xmldoc;
    }