code: def offset():
      return CDay()
  
file_path: pandas/pandas/tests/tseries/offsets/test_custom_business_day.py
imports: from datetime import datetime, timedelta
  import numpy
  import pytest
  from pandas._libs.tslibs.offsets import CDay
  from pandas import _testing, read_pickle
  from pandas.tests.tseries.offsets.common import assert_offset_equal
  from pandas.tseries.holiday import USFederalHolidayCalendar
label_desc: Use image node_id 1 for calling a global function with example usage: offset() and returns: CDay