def delete_keys(self, keys: Sequence[str]) -> None:
        """Delete specified records from the database.
        Args:
            keys: A list of keys to delete.
        """
[docs]    @abstractmethod
    async def adelete_keys(self, keys: Sequence[str]) -> None:
        """Delete specified records from the database.
        Args:
            keys: A list of keys to delete.
        """