public TestSubjectGenerator<?> getInnerGenerator() {
      return generator;
    }
  }

  public static class InverseBiMapGenerator<K extends @Nullable Object, V extends @Nullable Object>
      implements TestBiMapGenerator<V, K>, DerivedGenerator {

    private final OneSizeTestContainerGenerator<BiMap<K, V>, Entry<K, V>> generator;

    public InverseBiMapGenerator(

    public TestSubjectGenerator<?> getInnerGenerator() {
      return generator;
    }
  }

  public static class InverseBiMapGenerator<K extends @Nullable Object, V extends @Nullable Object>
      implements TestBiMapGenerator<V, K>, DerivedGenerator {

    private final OneSizeTestContainerGenerator<BiMap<K, V>, Entry<K, V>> generator;

    public InverseBiMapGenerator(