code: def test_dtypes_are_correct_after_groupby_last(self, data):
      # GH46409
      df = DataFrame(
          {"id": [1, 2, 3, 4], "test": [True, pd.NA, data, False]}
      ).convert_dtypes()
      result = df.groupby("id").last().test
      expected = df.set_index("id").test
      assert result.dtype == pd.BooleanDtype()
      tm.assert_series_equal(expected, result)
  
file_path: pandas/pandas/tests/frame/methods/test_dtypes.py
imports: from datetime import timedelta
  import numpy
  import pytest
  from pandas.core.dtypes.dtypes import DatetimeTZDtype
  import pandas
  from pandas import DataFrame, Series, date_range, option_context
  import pandas._testing
label_desc: Use image node_id 4 for calling the TestDataFrameDataTypes obj's underlying member method code with example usage: obj.test_dtypes_are_correct_after_groupby_last(data) without return types