// lots of different ways to configure a LoadingCache
    CacheBuilderFactory factory = cacheFactory();
    return Iterables.transform(
        factory.buildAllPermutations(), builder -> builder.build(identityLoader()));
  }

  private CacheBuilderFactory cacheFactory() {
    return new CacheBuilderFactory()
        .withKeyStrengths(ImmutableSet.of(Strength.STRONG, Strength.WEAK))

    // lots of different ways to configure a LoadingCache
    CacheBuilderFactory factory = cacheFactory();
    return Iterables.transform(
        factory.buildAllPermutations(), builder -> builder.recordStats().build(identityLoader()));
  }

  private CacheBuilderFactory cacheFactory() {
    // This is trickier than expected. We plan to put 15 values in each of these (WARMUP_MIN to