def METHOD_NAME(self) -> None:
    parser = ArgumentParser(prog='chipsec_util msgbus', usage=__doc__)
    subparsers = parser.add_subparsers()
    parser_read = subparsers.add_parser('read')
    parser_read.add_argument('port', type=lambda x: int(x, 16), help='Port (hex)')
    parser_read.add_argument('reg', type=lambda x: int(x, 16), help='Register (hex)')
    parser_read.set_defaults(func=self.msgbus_read)
    parser_write = subparsers.add_parser('write')
    parser_write.add_argument('port', type=lambda x: int(x, 16), help='Port (hex)')
    parser_write.add_argument('reg', type=lambda x: int(x, 16), help='Register (hex)')
    parser_write.add_argument('val', type=lambda x: int(x, 16), help='Value (hex)')
    parser_write.set_defaults(func=self.msgbus_write)
    parser_mmread = subparsers.add_parser('mm_read')
    parser_mmread.add_argument('port', type=lambda x: int(x, 16), help='Port (hex)')
    parser_mmread.add_argument('reg', type=lambda x: int(x, 16), help='Register (hex)')
    parser_mmread.set_defaults(func=self.msgbus_mm_read)
    parser_mmwrite = subparsers.add_parser('mm_write')
    parser_mmwrite.add_argument('port', type=lambda x: int(x, 16), help='Port (hex)')
    parser_mmwrite.add_argument('reg', type=lambda x: int(x, 16), help='Register (hex)')
    parser_mmwrite.add_argument('val', type=lambda x: int(x, 16), help='Value (hex)')
    parser_mmwrite.set_defaults(func=self.msgbus_mm_write)
    parser_message = subparsers.add_parser('message')
    parser_message.add_argument('port', type=lambda x: int(x, 16), help='Port (hex)')
    parser_message.add_argument('reg', type=lambda x: int(x, 16), help='Register (hex)')
    parser_message.add_argument('opcode', type=lambda x: int(x, 16), help='OPCODE (hex)')
    parser_message.add_argument('val', type=lambda x: int(x, 16), nargs='?', default=None, help='Value (hex)')
    parser_message.set_defaults(func=self.msgbus_message)
    parser.parse_args(self.argv, namespace=self)