code: def test_2016_holidays(self):
      # 2016 holidays:
      # new years: 2016-01-01
      # good friday: 2016-03-25
      # christmas (observed): 2016-12-26
  
      for date in ["2016-01-01", "2016-03-25", "2016-12-26"]:
          self.assertFalse(
              self.calendar.is_session(pd.Timestamp(date, tz="UTC"))
          )
  
file_path: catalyst/tests/calendars/test_ice_calendar.py
imports: from unittest import TestCase
  import pandas
  from .test_trading_calendar import ExchangeCalendarTestBase
  from catalyst.utils.calendars.exchange_calendar_ice import ICEExchangeCalendar
label_desc: Use image node_id 2 for calling the ICECalendarTestCase obj's underlying member method code with example usage: obj.test_2016_holidays() without return types