@Override
  public ClosableIterator<TimestampedValue<V>> get(K key, long timestamp) {
    return get(key, timestamp, timestamp + 1);
  }
Creates a {@link TimeSeriesStoreImpl} in append mode.

@param kvStore the backing kv store to use
samza-core/src/main/java/org/apache/samza/operators/impl/store/TimeSeriesStoreImpl.java