code: def test_object_type_missing_vals(
      bool_agg_func, data, expected_res, frame_or_series
  ):
      # GH#37501
      obj = frame_or_series(data, dtype=object)
      result = obj.groupby([1] * len(data)).agg(bool_agg_func)
      expected = frame_or_series(
          [expected_res], index=np.array([1]), dtype="bool"
      )
      tm.assert_equal(result, expected)
  
imports: import builtins
  import datetime
  from string import ascii_lowercase
  import numpy
  import pytest
  from pandas._libs.tslibs import iNaT
  import pandas
  from pandas import DataFrame, MultiIndex, Series, Timestamp, date_range, isna
  import pandas._testing
  from pandas.util import _test_decorators
label_desc: Use image node_id 8 for calling a global function with example usage: test_object_type_missing_vals(bool_agg_func, data, expected_res, frame_or_series) without return types