public function combinexml(SimpleXMLElement $new_child)
    {
        $node1 = dom_import_simplexml($this->_SimpleXmlElement);
        $dom_sxe = dom_import_simplexml($new_child);
        $node2 = $node1->ownerDocument->importNode($dom_sxe, true);
        $node1->appendChild($node2);
    }