code: def test_groupby_extension_apply(
      self, data_for_grouping, groupby_apply_op
  ):
      super().test_groupby_extension_apply(
          data_for_grouping, groupby_apply_op
      )
  
imports: from __future__ import annotations
  import string
  from typing import cast
  import numpy
  import pytest
  import pandas
  import pandas._testing
  from pandas.api.types import is_string_dtype
  from pandas.core.arrays import ArrowStringArray
  from pandas.core.arrays.string_ import StringDtype
  from pandas.tests.extension import base
label_desc: Use image node_id 13 for calling the TestStringArray obj's underlying member method code with example usage: obj.test_groupby_extension_apply(data_for_grouping, groupby_apply_op) without return types