@Override
        public byte[] serialize() {
            return segmentValue;
        }
This value will be null if the caller did not specify that the value should be
included with the return result from {@link SegmentValue#find(long, boolean)}.
In this case, it is up to the caller to not call this method, as the "value"
returned will not be meaningful.
streams/src/main/java/org/apache/kafka/streams/state/internals/RocksDBVersionedStoreSegmentValueFormatter.java