private static final long serialVersionUID = 1L;

    public GsaConfigException(final String message, final Throwable cause) {
        super(message, cause);
    }

    public GsaConfigException(final String message) {
        super(message);
    }

    private static final long serialVersionUID = 1L;

    public OpenSearchAccessException(final String message) {
        super(message);
    }

    public OpenSearchAccessException(final String message, final Throwable cause) {
        super(message, cause);
    }

  protected abstract <E extends Comparable<? super E>> Set<E> of();

  protected abstract <E extends Comparable<? super E>> Set<E> of(E e);

  protected abstract <E extends Comparable<? super E>> Set<E> of(E e1, E e2);

  protected abstract <E extends Comparable<? super E>> Set<E> of(E e1, E e2, E e3);

  protected abstract <E extends Comparable<? super E>> Set<E> of(E e1, E e2, E e3, E e4);

    }

    @Override
    public List<String> getModelIds() {
        return modelIds;
    }

    public DefaultModelBuildingResult addModelId(String modelId) {
        // Intentionally notNull because Super POM may not contain a modelId
        Objects.requireNonNull(modelId, "modelId cannot null");

        modelIds.add(modelId);

        return this;
    }

    @Override
    public Model getRawModel() {

      new RegularImmutableSortedSet<>(ImmutableList.<Comparable>of(), Ordering.natural());

  private final transient ImmutableList<E> elements;

  RegularImmutableSortedSet(ImmutableList<E> elements, Comparator<? super E> comparator) {
    super(comparator);
    this.elements = elements;
  }

  @Override
  @CheckForNull
  Object[] internalArray() {
    return elements.internalArray();
  }

  @Override

    private static final long serialVersionUID = 1L;

    public SearchEngineClientException(final String message, final Throwable cause) {
        super(message, cause);
    }

    public SearchEngineClientException(final String message) {
        super(message);
    }

    testers.add(SortedMapNavigationTester.class);
    return testers;
  }

  @Override
  public TestSuite createTestSuite() {
    if (!getFeatures().contains(KNOWN_ORDER)) {
      List<Feature<?>> features = copyToList(getFeatures());
      features.add(KNOWN_ORDER);
      withFeatures(features);
    }
    return super.createTestSuite();
  }

  @Override

    @CanIgnoreReturnValue
    @Override
    public Builder<K, V> orderEntriesByValue(Comparator<? super V> valueComparator) {
      super.orderEntriesByValue(valueComparator);
      return this;
    }

    @Override
    @CanIgnoreReturnValue
    Builder<K, V> combine(ImmutableMap.Builder<K, V> builder) {
      super.combine(builder);
      return this;
    }

    /**

        private final Deque<ActivationFrame> stk;

        ActivationWalker(Deque<ActivationFrame> stk, UnaryOperator<String> transformer) {
            super(transformer);
            this.stk = stk;
        }

        private ActivationFrame nextFrame(String property) {
            return new ActivationFrame(property, Optional.empty());
        }

  @Override
  protected abstract BlockingQueue<E> delegate();

  @CanIgnoreReturnValue
  @Override
  public int drainTo(Collection<? super E> c, int maxElements) {
    return delegate().drainTo(c, maxElements);
  }

  @CanIgnoreReturnValue
  @Override
  public int drainTo(Collection<? super E> c) {
    return delegate().drainTo(c);
  }

  @CanIgnoreReturnValue // TODO(kak): consider removing this
  @Override