src/transformers/models/auto/feature_extraction_auto.py/AutoFeatureExtractor/register
class AutoFeatureExtractor:    def register(config_class, feature_extractor_class):
        """
        Register a new feature extractor for this class.

        Args:
            config_class ([`PretrainedConfig`]):
                The configuration corresponding to the model to register.
            feature_extractor_class ([`FeatureExtractorMixin`]): The feature extractor to register.
        """
        FEATURE_EXTRACTOR_MAPPING.register(config_class, feature_extractor_class)