def set_src_lang_special_tokens(self, src_lang: str) -> None:
        """Reset the special tokens to the source lang setting. prefix=[src_lang_code] and suffix=[eos]."""
        self.cur_lang_code_id = self.lang_code_to_id[src_lang]
        self.prefix_tokens = [self.cur_lang_code_id]
        self.suffix_tokens = [self.eos_token_id]
Reset the special tokens to the source lang setting. prefix=[src_lang_code] and suffix=[eos].
dpkd/transformers/src/transformers/models/mbart50/tokenization_mbart50.py