code: def test_insert_mismatched_types_raises(self, item):
      # GH#33703 dont cast these to td64
      tdi = TimedeltaIndex(["4day", "1day", "2day"], name="idx")
  
      result = tdi.insert(1, item)
  
      expected = Index(
          [tdi[0], lib.item_from_zerodim(item)] + list(tdi[1:]),
          dtype=object,
          name="idx",
      )
      tm.assert_index_equal(result, expected)
  
file_path: pandas/pandas/tests/indexes/timedeltas/methods/test_insert.py
imports: from datetime import timedelta
  import numpy
  import pytest
  from pandas._libs import lib
  import pandas
  from pandas import Index, Timedelta, TimedeltaIndex, timedelta_range
  import pandas._testing
label_desc: Use image node_id 4 for calling the TestTimedeltaIndexInsert obj's underlying member method code with example usage: obj.test_insert_mismatched_types_raises(item) without return types