code: def get_available_holidays_in_countries(
      countries, year_start, year_end
  ):
      """Returns a dictionary mapping each country to its holidays
          between the years specified.
  
      :param countries: List[str]
          countries for which we need holidays
      :param year_start: int
          first year of interest
      :param year_end: int
          last year of interest
      :return: Dict[str, List[str]]
          key: country name
          value: list of holidays in that country between [year_start, year_end]
      """
      return get_hdays.get_available_holidays_in_countries(
          countries=countries, year_start=year_start, year_end=year_end
      )
  
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 13 for calling a global function with example usage: get_available_holidays_in_countries(countries, year_start, year_end) and returns: get_hdays