}

  public void testValuesIsNotASet() {
    assertThat(CacheBuilder.newBuilder().build().asMap().values() instanceof Set).isFalse();
  }

  @GwtIncompatible // CacheTesting
  public void testNullCache() {
    CountingRemovalListener<Object, Object> listener = countingRemovalListener();
    LoadingCache<Object, Object> nullCache =