code: public <T extends Model>  void addModels(List<T> models){
          for (T model : models) {
              add(model);
          }
      }
docs: Convenience method. Calls {@link #add(Model)} one at the time for each member of the list.
  All rules of the {@link #add(Model)} method apply.
  
  @param models list of model instances to add to this one.