Outputs a <div ng-form="name"> for this set of choice fields to nest an ngForm.

def render(self):
        """
        Outputs a <div ng-form="name"> for this set of choice fields to nest an ngForm.
        """
        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))