@Override
    protected IndexToBaseStoreIterator getIndexToBaseStoreIterator(
        final SegmentIterator<KeyValueSegment> segmentIterator) {
        return new SessionKeySchemaIndexToBaseStoreIterator(segmentIterator);
    }
A RocksDB backed time-ordered segmented bytes store for session key schema.
streams/src/main/java/org/apache/kafka/streams/state/internals/RocksDBTimeOrderedSessionSegmentedBytesStore.java