Set children = new PropertyListSet();
Set children = new HashSet();
  public Set getChildrenEntities() {    Set children = new PropertyListSet();    if (myModel != null) {      Iterator modelsIter = myModel.getModelGroup().getModels().iterator();      while (modelsIter.hasNext()) {        EOModel model = (EOModel) modelsIter.next();        Iterator entitiesIter = model.getEntities().iterator();        while (entitiesIter.hasNext()) {          EOEntity entity = (EOEntity) entitiesIter.next();          if (entity.getParent() == this) {            children.add(entity);          }        }      }    }    return children;  }