public TestWriter(TestOutputStream out) {
    super(new OutputStreamWriter(checkNotNull(out), UTF_8));
    this.out = out;
  }

  @Override
  public void write(int c) throws IOException {
    super.write(c);
    flush(); // flush write to TestOutputStream to get its behavior
  }

  @Override
  public void write(char[] cbuf, int off, int len) throws IOException {
    super.write(cbuf, off, len);
    flush();
  }

  public static <T extends @Nullable Object, K, V>
      Collector<T, ?, ImmutableSortedMap<K, V>> toImmutableSortedMap(
          Comparator<? super K> comparator,
          Function<? super T, ? extends K> keyFunction,
          Function<? super T, ? extends V> valueFunction) {
    return CollectCollectors.toImmutableSortedMap(comparator, keyFunction, valueFunction);
  }

  /**

    public Chars() {
      // elements aren't sorted, to better test SortedSet iteration ordering
      super('b', 'a', 'c', 'd', 'e');
    }
  }

  public static class Enums extends SampleElements<AnEnum> {
    public Enums() {
      // elements aren't sorted, to better test SortedSet iteration ordering
      super(AnEnum.B, AnEnum.A, AnEnum.C, AnEnum.D, AnEnum.E);
    }
  }

    public Chars() {
      // elements aren't sorted, to better test SortedSet iteration ordering
      super('b', 'a', 'c', 'd', 'e');
    }
  }

  public static class Enums extends SampleElements<AnEnum> {
    public Enums() {
      // elements aren't sorted, to better test SortedSet iteration ordering
      super(AnEnum.B, AnEnum.A, AnEnum.C, AnEnum.D, AnEnum.E);
    }
  }

    super(map);
  }

  @Override
  public SortedMap<K, Collection<V>> asMap() {
    return (SortedMap<K, Collection<V>>) super.asMap();
  }

  @Override
  SortedMap<K, Collection<V>> backingMap() {
    return (SortedMap<K, Collection<V>>) super.backingMap();
  }

  @Override
  public SortedSet<K> keySet() {
    return (SortedSet<K>) super.keySet();
  }

  @Override

    return suite;
  }

  @Override
  protected <E extends Comparable<? super E>> Set<E> of() {
    return ImmutableSet.of();
  }

  @Override
  protected <E extends Comparable<? super E>> Set<E> of(E e) {
    return ImmutableSet.of(e);
  }

  @Override
  protected <E extends Comparable<? super E>> Set<E> of(E e1, E e2) {
    return ImmutableSet.of(e1, e2);
  }

  @Override

  CompactLinkedHashMap(int expectedSize, boolean accessOrder) {
    super(expectedSize);
    this.accessOrder = accessOrder;
  }

  @Override
  void init(int expectedSize) {
    super.init(expectedSize);
    this.firstEntry = ENDPOINT;
    this.lastEntry = ENDPOINT;
  }

  @Override
  int allocArrays() {
    int expectedSize = super.allocArrays();
    this.links = new long[expectedSize];

    final Collection<E> unfiltered;
    final Predicate<? super E> predicate;

    FilteredCollection(Collection<E> unfiltered, Predicate<? super E> predicate) {
      this.unfiltered = unfiltered;
      this.predicate = predicate;
    }

    FilteredCollection<E> createCombined(Predicate<? super E> newPredicate) {

  CompactLinkedHashSet() {
    super();
  }

  CompactLinkedHashSet(int expectedSize) {
    super(expectedSize);
  }

  @Override
  void init(int expectedSize) {
    super.init(expectedSize);
    this.firstEntry = ENDPOINT;
    this.lastEntry = ENDPOINT;
  }

  @Override
  int allocArrays() {
    int expectedSize = super.allocArrays();

    @Override
    public void lock() {
      aboutToAcquire(this);
      try {
        super.lock();
      } finally {
        lockStateChanged(this);
      }
    }

    @Override
    public void lockInterruptibly() throws InterruptedException {
      aboutToAcquire(this);
      try {
        super.lockInterruptibly();
      } finally {
        lockStateChanged(this);
      }
    }