code: def test_nat_methods_nan(method):
      # see gh-9513, gh-17329
      assert np.isnan(getattr(NaT, method)())
  
imports: from datetime import datetime, timedelta
  import operator
  import numpy
  import pytest
  import pytz
  from pandas._libs.tslibs import iNaT
  from pandas.compat.numpy import np_version_gte1p24p3
  from pandas import DatetimeIndex, DatetimeTZDtype, Index, NaT, Period, Series, Timedelta, TimedeltaIndex, Timestamp, isna, offsets
  import pandas._testing
  from pandas.core import roperator
  from pandas.core.arrays import DatetimeArray, PeriodArray, TimedeltaArray
label_desc: Use image node_id 6 for calling a global function with example usage: test_nat_methods_nan(method) without return types