computingSignal.countDown();
            startSignal.await();
            return computedObject;
          }
        };

    QueuingRemovalListener<Object, Object> listener = queuingRemovalListener();
    CacheBuilder<Object, Object> builder =
        createCacheBuilder().concurrencyLevel(1).removalListener(listener);
    LocalCache<Object, Object> map = makeLocalCache(builder);