@Override
        public void addToBatch(final byte[] key,
                               final byte[] value,
                               final WriteBatchInterface batch) throws RocksDBException {
            if (value == null) {
                batch.delete(columnFamily, key);
            } else {
                batch.put(columnFamily, key, value);
            }
        }
Deletes keys entries in the range ['from', 'to'], including 'from' and excluding 'to'.
streams/src/main/java/org/apache/kafka/streams/state/internals/RocksDBStore.java