@Override
    public KeyValueIterator<Windowed<Bytes>, byte[]> backwardFetch(final Bytes key) {
        return wrapped().backwardFetch(key);
    }
@Test
    public void shouldDelegateToUnderlyingStoreWhenBackwardFetching() {
        store.backwardFetch(bytesKey);

        verify(inner).backwardFetch(bytesKey);
    }