'Subtypes should append these to their args.'

@classmethod
def other_args(cls):

    return ((('-o', '--output'), dict(metavar='FILENAME', action='append', type=str, help='Name    of    the    output    file    or    -    for    standard    output.')), ('--args', dict(metavar='COMMAND-LINE-ARGS', nargs=argparse.REMAINDER, help='Any    command    line    arguments    remaining    are    passed    on    to    the    application    handler')))
