code: def test_is_utc(utc_fixture):
      tz = timezones.maybe_get_tz(utc_fixture)
      assert timezones.is_utc(tz)
  
file_path: pandas/pandas/tests/tslibs/test_timezones.py
imports: from datetime import datetime, timedelta, timezone
  import dateutil.tz
  import pytest
  import pytz
  from pandas._libs.tslibs import conversion, timezones
  from pandas.compat import is_platform_windows
  from pandas import Timestamp
label_desc: Use image node_id 1 for calling a global function with example usage: test_is_utc(utc_fixture) without return types