How to use the nanopb.nanopb.generator.nanopb_generator.Globals.verbose_options function in nanopb

options, filenames = optparser.parse_args()

    if not filenames:
        optparser.print_help()
        sys.exit(1)

    if options.quiet:
        options.verbose = False

    if options.output_dir and not os.path.exists(options.output_dir):
        optparser.print_help()
        sys.stderr.write("\noutput_dir does not exist: %s\n" % options.output_dir)
        sys.exit(1)


    Globals.verbose_options = options.verbose
    for filename in filenames:
        results = process_file(filename, None, options)

        base_dir = options.output_dir or ''
        to_write = [
            (os.path.join(base_dir, results['headername']), results['headerdata']),
            (os.path.join(base_dir, results['sourcename']), results['sourcedata']),
        ]

        if not options.quiet:
            paths = " and ".join([x[0] for x in to_write])
            sys.stderr.write("Writing to %s\n" % paths)

        for path, data in to_write:
            with open(path, 'w') as f:
                f.write(data)

if isinstance(subdesc.options, descriptor.FieldOptions):
        ext_type = nanopb_pb2.nanopb
    elif isinstance(subdesc.options, descriptor.FileOptions):
        ext_type = nanopb_pb2.nanopb_fileopt
    elif isinstance(subdesc.options, descriptor.MessageOptions):
        ext_type = nanopb_pb2.nanopb_msgopt
    elif isinstance(subdesc.options, descriptor.EnumOptions):
        ext_type = nanopb_pb2.nanopb_enumopt
    else:
        raise Exception("Unknown options type")

    if subdesc.options.HasExtension(ext_type):
        ext = subdesc.options.Extensions[ext_type]
        new_options.MergeFrom(ext)

    if Globals.verbose_options:
        sys.stderr.write("Options for " + dotname + ": ")
        sys.stderr.write(text_format.MessageToString(new_options) + "\n")

    return new_options