Set entityNames = new PropertyListSet();
Set entityNames = new TreeSet();
  public Set getEntityNames() {    Set entityNames = new PropertyListSet();    Iterator modelsIter = myModels.iterator();    while (modelsIter.hasNext()) {      EOModel model = (EOModel) modelsIter.next();      Iterator entitiesIter = model.getEntities().iterator();      while (entitiesIter.hasNext()) {        EOEntity entity = (EOEntity) entitiesIter.next();        entityNames.add(entity.getName());      }    }    return entityNames;  }