code: def test_scoped_special_var(self, test_env_async):
      t = test_env_async.from_string(
          "{% for s in seq %}[{{ loop.first }}{% for c in s %}"
          "|{{ loop.first }}{% endfor %}]{% endfor %}"
      )
      assert (
          t.render(seq=("ab", "cd"))
          == "[True|True|False][False|True|False]"
      )
  
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 19 for calling the TestAsyncForLoop obj's underlying member method code with example usage: obj.test_scoped_special_var(test_env_async) without return types