src/transformers/models/speech_to_text/tokenization_speech_to_text.py/Speech2TextTokenizer/convert_tokens_to_string
class Speech2TextTokenizer:    def convert_tokens_to_string(self, tokens: List[str]) -> str:
        """Converts a sequence of tokens (strings for sub-words) in a single string."""
        out_string = self.sp_model.decode(tokens)

        if self.do_upper_case:
            out_string = out_string.upper()
        return out_string