@Override
    public V fetch(final K key, final long time) {
        Objects.requireNonNull(key, "key can't be null");
        final List<ReadOnlyWindowStore<K, V>> stores = provider.stores(storeName, windowStoreType);
        for (final ReadOnlyWindowStore<K, V> windowStore : stores) {
            try {
                final V result = windowStore.fetch(key, time);
                if (result != null) {
                    return result;
                }
            } catch (final InvalidStateStoreException e) {
                throw new InvalidStateStoreException(
                    "State store is not available anymore and may have been migrated to another instance; " +
                        "please re-discover its location from the state metadata.");
            }
        }
        return null;
    }
@Test
    public void shouldNotGetValuesFromOtherStores() {
        otherUnderlyingStore.put("some-key", "some-value", 0L);
        underlyingWindowStore.put("some-key", "my-value", 1L);

        final List<KeyValue<Long, String>> results =
            StreamsTestUtils.toList(windowStore.fetch("some-key", ofEpochMilli(0L), ofEpochMilli(2L)));
        assertEquals(Collections.singletonList(new KeyValue<>(1L, "my-value")), results);
    }