toXml method
Implementation
_s.XmlElement toXml(String elemName, {List<_s.XmlAttribute>? attributes}) {
  final tagSet = this.tagSet;
  final $children = <_s.XmlNode>[
    if (tagSet != null)
      _s.XmlElement(
          _s.XmlName('TagSet'), [], tagSet.map((e) => e.toXml('member'))),
  ];
  final $attributes = <_s.XmlAttribute>[
    ...?attributes,
  ];
  return _s.XmlElement(
    _s.XmlName(elemName),
    $attributes,
    $children,
  );
}