def convert_tokens_to_string(self, tokens):
        """Converts a sequence of tokens (string) in a single string."""
        if self.subword_tokenizer_type == "sentencepiece":
            return self.subword_tokenizer.sp_model.decode(tokens)
        out_string = " ".join(tokens).replace(" ##", "").strip()
        return out_string
Converts a sequence of tokens (string) in a single string.
dpkd/transformers/src/transformers/models/bert_japanese/tokenization_bert_japanese.py