final AtomicInteger computeCount = new AtomicInteger();
    final AtomicInteger exceptionCount = new AtomicInteger();
    final AtomicInteger computeNullCount = new AtomicInteger();
    @SuppressWarnings("CacheLoaderNull") // test of handling of erroneous implementation
    CacheLoader<String, String> countingIdentityLoader =
        new CacheLoader<String, String>() {
          @Override

    LoadingCache<String, String> cache =
        builder.build(
            new CacheLoader<String, String>() {
              @Override
              @SuppressWarnings("CacheLoaderNull") // test of broken user implementation
              public String load(String key) throws InterruptedException {
                callCount.incrementAndGet();
                startSignal.await();