code: def get_available_holiday_lookup_countries(countries=None):
      """Returns list of available countries for modeling holidays
  
      :param countries: List[str]
          only look for available countries in this set
      :return: List[str]
          list of available countries for modeling holidays
      """
      return get_hdays.get_available_holiday_lookup_countries(
          countries=countries
      )
  
imports: import math
  from datetime import datetime
  from datetime import timedelta
  import numpy
  import pandas
  import pytz
  from holidays_ext import get_holidays
  from pandas.tseries.frequencies import to_offset
  from scipy.special import expit
  from greykite.common import constants
  from greykite.common.python_utils import split_offset_str
label_desc: Use image node_id 12 for calling a global function with example usage: get_available_holiday_lookup_countries(countries) and returns: get_hdays