Hydrator for `Duration` values.

    :param months:
    :param days:
    :param seconds:
    :param nanoseconds:
    :return: `duration` namedtuple

def hydrate_duration(months, days, seconds, nanoseconds):
    """ Hydrator for `Duration` values.

    :param months:
    :param days:
    :param seconds:
    :param nanoseconds:
    :return: `duration` namedtuple
    """
    return Duration(months=months, days=days, seconds=seconds, nanoseconds=nanoseconds)