code: def test_bare_async(self, test_env_async):
      t = test_env_async.from_string('{% extends "header" %}')
      assert t.render(foo=42) == "[42|23]"
  
imports: import asyncio
  import pytest
  from jinja2 import DictLoader
  from jinja2 import Environment
  from jinja2 import Template
  from jinja2.asyncsupport import auto_aiter
  from jinja2.exceptions import TemplateNotFound
  from jinja2.exceptions import TemplatesNotFound
  from jinja2.exceptions import UndefinedError
label_desc: Use image node_id 27 for calling the TestAsyncForLoop obj's underlying member method code with example usage: obj.test_bare_async(test_env_async) without return types