docs: def bulk_create(self, objs, *args, **kwargs):
          """Insert many object at once."""
          if hasattr(self.model, 'save_prep'):
              # Method from AbstractBaseModel. If the model class doesn't
              # subclass AbstractBaseModel, then don't call this.
              self.model.save_prep(instance_or_instances=objs)
  
          return super(CommonManager, self).bulk_create(objs=objs,
                                                        *args,
                                                        **kwargs)