@Deprecated
    @Override
    public void init(final ProcessorContext context,
                     final StateStore root) {
        if (context instanceof StateStoreContext) {
            init((StateStoreContext) context, root);
        } else {
            throw new UnsupportedOperationException(
                "Use RocksDBStore#init(StateStoreContext, StateStore) instead."
            );
        }
    }
A persistent key-value store based on RocksDB.
streams/src/main/java/org/apache/kafka/streams/state/internals/RocksDBStore.java