def _convert_id_to_token(self, index: int) -> Union[bytes, str]:
        """Converts an id to a token, special tokens included"""
        if index in self.decoder:
            return self.decoder[index]
        raise ValueError("unknown ids")
Converts an id to a token, special tokens included
dpkd/transformers/src/transformers/models/qwen_parallel/tokenization_qwen.py