@staticmethod
def _year_from_2digits(short_year, current_year):
    """
        Converts a relative 2-digit year to an absolute 4-digit year
        :param short_year: the relative year
        :param current_year: the current year
        :return: the absolute year
        """
    if short_year < 100:
        short_year += current_year - current_year % 100
        if abs(short_year - current_year) >= 50:
            if short_year < current_year:
                return short_year + 100
            else:
                return short_year - 100
    return short_year
