return delegate.aboveSamplesGreater().getKey();
    }
  }

  public static class MapValueCollectionGenerator<
          K extends @Nullable Object, V extends @Nullable Object>
      implements TestCollectionGenerator<V>, DerivedGenerator {
    private final OneSizeTestContainerGenerator<Map<K, V>, Entry<K, V>> mapGenerator;
    private final SampleElements<V> samples;

    public MapValueCollectionGenerator(