@XmlElement(name = "participantList", required = true)
 public void setJAXBParticipantWrapper(JAXBParticipantWrapper jaxbParticipantWrapper) {
   super.setParticipantWrapper(jaxbParticipantWrapper);
 }
 @Override
 protected void initialiseParticipantWrapper() {
   super.setParticipantWrapper(new JAXBParticipantWrapper());
 }