def METHOD_NAME(cmd):
    cmd = click.option(
        "--model_file",
        "-m",
        default=None,
        type=click.Path(exists=True, dir_okay=False),
        help="Path to model file.",
    )(cmd)
    cmd = click.option(
        "--parameters_file",
        "-p",
        default=None,
        type=click.Path(exists=True, dir_okay=False),
        help="(optional) Path to parameter file.",
    )(cmd)
    cmd = click.argument(
        "scheme_file", type=click.Path(exists=True, dir_okay=False), required=False
    )(cmd)
    return cmd