docs: def register_for_app(
          self, app_label=None, exclude_models=None, exclude_model_classes=None
      ):
          """Registers all models for this app_label.
          """
          models = []
          exclude_models = exclude_models or []
          app_config = django_apps.get_app_config(app_label)
          for model in app_config.get_models():
              if model._meta.label_lower in exclude_models:
                  pass
              elif exclude_model_classes and issubclass(model, exclude_model_classes):
                  pass
              else:
                  models.append(model._meta.label_lower)
          self.register(models)