added_objects = createIdSet(); added_objects.add(id);
added_objects = createIdSet(); added_objects.add(id);
removed_objects = createIdSet(); removed_objects.add(id);
removed_objects = createIdSet(); removed_objects.add(id);
added_objects = createIdSet(); added_objects.add(id);
added_objects = createIdSet(); added_objects.add(id);
removed_objects = createIdSet(); removed_objects.add(id);
removed_objects = createIdSet(); removed_objects.add(id);