code: def test_bool_dep(self) -> None:
      # GH-51749
      msg_warn = (
          "DataFrame.bool is now deprecated and will be removed "
          "in future version of pandas"
      )
      with tm.assert_produces_warning(FutureWarning, match=msg_warn):
          DataFrame({"col": [False]}).bool()
  
imports: from copy import copy, deepcopy
  import numpy
  import pytest
  from pandas.core.dtypes.common import is_scalar
  from pandas import DataFrame, Index, Series, date_range
  import pandas._testing
label_desc: Use image node_id 16 for calling the TestNDFrame obj's underlying member method code with example usage: obj.test_bool_dep() without return types