code: def test_20_style(self):
      self._run_doctest(
          "tutorial/index.rst",
          "tutorial/engine.rst",
          "tutorial/dbapi_transactions.rst",
          "tutorial/metadata.rst",
          "tutorial/data.rst",
          "tutorial/data_insert.rst",
          "tutorial/data_select.rst",
          "tutorial/data_update.rst",
          "tutorial/orm_data_manipulation.rst",
          "tutorial/orm_related_objects.rst",
      )
  
imports: from __future__ import annotations
  import doctest
  import logging
  import os
  import re
  import sys
  from sqlalchemy.testing import config
  from sqlalchemy.testing import fixtures
  from sqlalchemy.testing import requires
label_desc: Use image node_id 8 for calling the DocTest obj's underlying member method code with example usage: obj.test_20_style() without return types