docs: def delete_view(self, request, object_id, extra_context=None):
          "The 'delete' admin view for this model."
          queryset = self.model._default_manager.filter(pk=object_id)
          response = self.delete_selected(request, queryset)
          if response:
              return response
          url = reverse('admin:%s_%s_changelist' % (self.model._meta.app_label, self.model._meta.model_name))
          return HttpResponseRedirect(url)