docs: @Override
    public SingleObjectBundle delete(DBIDRef id) {
      // Prepare bundle to return
      SingleObjectBundle bundle = new SingleObjectBundle();
      for(Relation<?> relation : relations) {
        bundle.append(relation.getDataTypeInformation(), relation.get(id));
      }
      doDelete(id);
      // fire deletion event
      eventManager.fireObjectRemoved(id);
  
      return bundle;
    }