default Optional<Integer> getAdditionalTTL(T data) {
        return Optional.empty();
    }
Extracts the additional time to live (TTL) for data.
The default implementation returns an empty Optional.

@param data
@return Optional
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/redis/src/main/java/org/apache/inlong/sort/redis/common/mapper/RedisMapper.java