toXML method

@override String toXML()

Implementation

@override
String toXML() {
  return '''
  <?xml version="1.0" encoding="utf-8"?>
  <cupps xmlns="$xmlns" messageID="$messageID" xmlns:xsi="$xsi" messageName="$messageName">
  <$messageName stopMessage="$stopMessage" canDefer="$canDefer"/>
  </cupps>
  ''';
}