def METHOD_NAME(self, parser):
    """Add extra arguments."""
    parser.add_argument(
        "--dburl", help="Custom database url")
    parser.add_argument(
        "--destdir", default=".",
        help="Directory where files will be created")
    parser.add_argument(
        "--force-overwrite", action="store_true", default=False,
        help="Force overwrite of existing map files")