def METHOD_NAME(self, key: str) -> Any:
    """Given a string key, return its predefined default value.
    This is the value that will be returned by babase.AppConfig.resolve()
    if the key is not present in the config dict or of an incompatible
    type.
    Raises an Exception for unrecognized key names. To get the list of keys
    supported by this method, use babase.AppConfig.builtin_keys(). Note
    that it is perfectly legal to store other data in the config; it just
    needs to be accessed through standard dict methods and missing values
    handled manually.
    """
    return _babase.get_appconfig_default_value(key)