code: def display_dialog(self, *args, **kwargs):
          
          form = kwargs.pop('form_instance', None)
          success_message = kwargs.pop('success_message', None)
  
          if not form:
              form = self.get_form_class()(initial=kwargs, instance=self.object)
  
          if not hasattr(form, "helper"):
              form.helper = FormHelper()
          form.helper.form_tag = False
  
          return {
              'title': self.title.format(
                  model_name=self.get_model_config().model_name,
                  object=str(self.object) if self.object else '',
              ),
              'content': self.render_to_string(self.template, {
                  'form': form,
                  'success_message': success_message,
              }),
              'submit_label': self.submit_label,
              'success': bool(success_message),
          }
docs: Display form and success message when set