  < source > ( )    Base class for all configuration classes. All configuration parameters are stored under self.config. Also
provides the from_config() and save_config() methods for loading, downloading, and
saving classes that inherit from ConfigMixin. Class attributes: config_name (str) — A filename under which the config should stored when calling
save_config() (should be overridden by parent class). ignore_for_config (List[str]) — A list o