if (stored_object.equals(ref.object))
if (stored_object.equals(ref.object) || stored_object._is_equivalent(ref.object) )
  public cObject getKey(org.omg.CORBA.Object stored_object)  {    Map.Entry item;    Iterator iter = objects.entrySet().iterator();    cObject ref;    while (iter.hasNext())      {        item = (Map.Entry) iter.next();        ref = (cObject) item.getValue();        if (stored_object.equals(ref.object))          return ref;      }    return null;  }