def convert_tokens_to_string(self, tokens: List[str]) -> str:
        """
        Converts a list of output tokens into a single string.
        """
        # combine tokens
        string = " ".join(tokens)

        # make sure @@ tokens are concatenated
        string = "".join(string.split(BPE_TOKEN_VOCAB))

        return string

        Converts a list of output tokens into a single string.
        
dpkd/transformers/src/transformers/models/speech_to_text_2/tokenization_speech_to_text_2.py