code: def test_get_loc_nat(self):
      tidx = TimedeltaIndex(
          ["1 days 01:00:00", "NaT", "2 days 01:00:00"]
      )
  
      assert tidx.get_loc(NaT) == 1
      assert tidx.get_loc(None) == 1
      assert tidx.get_loc(float("nan")) == 1
      assert tidx.get_loc(np.nan) == 1
  
imports: from datetime import datetime
  import re
  import numpy
  import pytest
  from pandas import Index, NaT, Timedelta, TimedeltaIndex, Timestamp, notna, offsets, timedelta_range, to_timedelta
  import pandas._testing
label_desc: Use image node_id 4 for calling the TestGetLoc obj's underlying member method code with example usage: obj.test_get_loc_nat() without return types