def all_special_ids(self):
        """
        list: All the token ids corresponding to all the special tokens.
        """
        all_toks = self.all_special_tokens
        all_ids = self.convert_tokens_to_ids(all_toks)
        return all_ids

        list: All the token ids corresponding to all the special tokens.
        
ptstructure/vqa/pytorchnlp/transformers/tokenizer_utils.py