assertThat(cache.getIfPresent(4)).isEqualTo(40);
    assertThat(cache.getIfPresent(5)).isEqualTo(50);
    assertThat(cache.getIfPresent(2)).isNull();
  }

  @SuppressWarnings({"deprecation", "LoadingCacheApply"})
  @Test
  public void loadingCache() throws ExecutionException {
    CacheLoader<Integer, Integer> loader =
        new CacheLoader<Integer, Integer>() {
          int i = 0;

          @Override