code: def render_built_form(parser, token):
      
      try:
          _, arg = token.split_contents()
          if "=" not in arg:
              arg = "form=" + arg
          name, value = arg.split("=", 1)
          if name not in ("form", "id", "slug"):
              raise ValueError
      except ValueError:
          e = ()
          raise template.TemplateSyntaxError(render_built_form.__doc__)
      return BuiltFormNode(name, value)
docs: render_build_form takes one argument in one of the following formats:
  
      {% render_build_form form_instance %}
      {% render_build_form form=form_instance %}
      {% render_build_form id=form_instance.id %}
      {% render_build_form slug=form_instance.slug %}