code: def render(self):
          
          start_tag = format_html('<div {}>', mark_safe(' '.join(self.field_attrs)))
          output = [start_tag]
          for widget in self:
              output.append(force_text(widget))
          output.append('</div>')
          return mark_safe('\n'.join(output))
docs: Outputs a <div ng-form="name"> for this set of choice fields to nest an ngForm.