def METHOD_NAME(self, parser):
    super().METHOD_NAME(parser)
    parser.add_argument("--field-class", action="store_true", default=None, help="show class name of field.")
    parser.add_argument("--db-type", action="store_true", default=None, help="show database column type of field.")
    parser.add_argument("--signature", action="store_true", default=None, help="show the signature of method.")
    parser.add_argument(
        "--all-methods", action="store_true", default=None, help="list all methods, including private and default."
    )
    parser.add_argument(
        "--model",
        nargs="?",
        type=str,
        default=None,
        help="list the details for a single model. Input should be in the form appname.Modelname",
    )