def get_keys(self, index_name: str) -> List[str]:
        """
        We need to override this because the indexer generates multiple keys.
        """
        # pylint: disable=no-self-use
        return [index_name, f"{index_name}-offsets", f"{index_name}-type-ids", "mask"]

        We need to override this because the indexer generates multiple keys.
        
gector/tokenizer_indexer.py