@XmlElement(name = "intraMolecular", defaultValue = "false", type = Boolean.class)
 public void setJAXBIntraMolecular(Boolean intra) {
   super.setIntraMolecular(intra);
 }
 @Override
 public void setIntraMolecular(boolean intra) {
   super.setIntraMolecular(intra);
 }