code: public void serialize(
        XmlSerializer serializer, String elementNamespaceUri, String elementLocalName, Object element)
        throws IOException {
      serialize(serializer, elementNamespaceUri, elementLocalName, element, true);
    }
docs: Shows a debug string representation of an element data object of key/value pairs.
  
  @param element element data object ({@link GenericXml}, {@link Map}, or any object with public
  fields)
  @param elementNamespaceUri XML namespace URI or {@code null} for no namespace
  @param elementLocalName XML local name
  @throws IOException I/O exception