code: def test_time_cross_validate_value_min_max():
      w = TimePicker(
          value=datetime.time(2),
          min=datetime.time(2),
          max=datetime.time(2),
      )
      with w.hold_trait_notifications():
          w.value = None
          w.min = datetime.time(4)
          w.max = datetime.time(6)
      assert w.value is None
      with w.hold_trait_notifications():
          w.value = datetime.time(4)
          w.min = None
          w.max = None
      assert w.value == datetime.time(4)
  
file_path: catboost/contrib/python/ipywidgets/py3/ipywidgets/widgets/tests/test_widget_time.py
imports: import pytest
  import datetime
  from traitlets import TraitError
  from ..widget_time import TimePicker
label_desc: Use image node_id 3 for calling a global function with example usage: test_time_cross_validate_value_min_max() without return types