src/transformers/models/speech_encoder_decoder/modeling_speech_encoder_decoder.py/SpeechEncoderDecoderModel/freeze_feature_encoder
class SpeechEncoderDecoderModel:    def freeze_feature_encoder(self):
        """
        Calling this function will disable the gradient computation for the feature encoder of the speech encoder so
        that its parameters will not be updated during training.
        """
        self.encoder.freeze_feature_encoder()