DBClusterBacktrackMessage.fromXml constructor
      
      DBClusterBacktrackMessage.fromXml(
    
    
- XmlElement elem
Implementation
factory DBClusterBacktrackMessage.fromXml(_s.XmlElement elem) {
  return DBClusterBacktrackMessage(
    dBClusterBacktracks: _s.extractXmlChild(elem, 'DBClusterBacktracks')?.let(
        (elem) => elem
            .findElements('DBClusterBacktrack')
            .map((c) => DBClusterBacktrack.fromXml(c))
            .toList()),
    marker: _s.extractXmlStringValue(elem, 'Marker'),
  );
}