code: def test_time_deserialize_none():
      assert time_from_json(None, None) == None
  
file_path: catboost/contrib/python/ipywidgets/py3/ipywidgets/widgets/tests/test_datetime_serializers.py
imports: import pytest
  import datetime
  import pytz
  from traitlets import TraitError
  from ..trait_types import time_to_json, time_from_json, datetime_to_json, datetime_from_json
label_desc: Use image node_id 3 for calling a global function with example usage: test_time_deserialize_none() without return types