void mapChildren(org.w3c.dom.Document doc) { org.w3c.dom.NodeList children = doc.getChildNodes();
void mapChildren() { org.w3c.dom.NodeList children = _node.getChildNodes();
        void mapChildren(org.w3c.dom.Document doc) {            org.w3c.dom.NodeList children = doc.getChildNodes();            mapElements(children);        }