INSTANCE
    }

    @Override
    <K, V> CrossBuildInMemoryCache<K, V> newCache() {
        return new TestCache<K, V>()
    }

    @Override
    <K, V> CrossBuildInMemoryCache<K, V> newCacheRetainingDataFromPreviousBuild(Predicate<V> retentionFilter) {
        return new TestCache<K, V>()
    }

    @Override
    <V> CrossBuildInMemoryCache<Class<?>, V> newClassCache() {
        return new TestCache<Class<?>, V>()

        CrossBuildInMemoryCache<UnitOfWork.Identity, ExecutionEngine.IdentityCacheResult<TransformExecutionResult.TransformWorkspaceResult>> identityCache = crossBuildInMemoryCacheFactory.newCacheRetainingDataFromPreviousBuild(result -> result.getResult().isSuccessful());

     *
     * @param retentionFilter Determines which values should be retained till the next build.
     */
    <K, V> CrossBuildInMemoryCache<K, V> newCacheRetainingDataFromPreviousBuild(Predicate<V> retentionFilter);

    /**