    def prepend_tgt_lang_tag_no_change(self) -> bool:
        """Prepend target lang ID token as the prev_output_tokens BOS (e.g. for
        to-many multilingual setting). No change needed during inference.
        This option is deprecated and replaced by prepend_tgt_lang_tag_as_bos.
        """
        value = self.config.get("prepend_tgt_lang_tag_no_change", None)
        if value is None:
            return self.config.get("prepend_tgt_lang_tag_as_bos", False)
        return value
Prepend target lang ID token as the prev_output_tokens BOS (e.g. for
to-many multilingual setting). No change needed during inference.
This option is deprecated and replaced by prepend_tgt_lang_tag_as_bos.
fairseq/data/audio/speech_to_text_joint_dataset.py