def convert_ids_to_string(self, ids):
        """
        Converts a sequence of tokens (strings for sub-words) in a single string.
        """
        tokens = self.convert_ids_to_tokens(ids)
        out_string = "".join(tokens).replace(SPIECE_UNDERLINE, " ").strip()
        return out_string

        Converts a sequence of tokens (strings for sub-words) in a single string.
        
dpkd/transformers/src/transformers/models/ernie_m/tokenization_ernie_m.py