Adjust the root timer save_itrs setting, such as for use in
    multiprocessing, when a root timer may become a parallel subdivision (see
    subdivide()).

    Args:
        setting (bool): Save individual iterations data, passed through bool()

    Returns:
        bool: Implemented setting value.

def set_save_itrs_root(setting):
    """
    Adjust the root timer save_itrs setting, such as for use in
    multiprocessing, when a root timer may become a parallel subdivision (see
    subdivide()).

    Args:
        setting (bool): Save individual iterations data, passed through bool()

    Returns:
        bool: Implemented setting value.
    """
    setting = bool(setting)
    f.root.times.save_itrs = setting
    return setting