extends FlatMapSpliteratorOfPrimitive<InElementT, Integer, IntConsumer, Spliterator.OfInt>
      implements Spliterator.OfInt {
    FlatMapSpliteratorOfInt(
        Spliterator.@Nullable OfInt prefix,
        Spliterator<InElementT> from,
        Function<? super InElementT, Spliterator.@Nullable OfInt> function,
        int characteristics,
        long estimatedSize) {

      extends FlatMapSpliteratorOfPrimitive<InElementT, Integer, IntConsumer, Spliterator.OfInt>
      implements Spliterator.OfInt {
    FlatMapSpliteratorOfInt(
        Spliterator.@Nullable OfInt prefix,
        Spliterator<InElementT> from,
        Function<? super InElementT, Spliterator.@Nullable OfInt> function,
        int characteristics,
        long estimatedSize) {

  }

  /**
   * @since 33.4.0 (but since 28.1 in the JRE flavor)
   */
  public static SpliteratorTester<Integer> ofInt(Supplier<Spliterator.OfInt> spliteratorSupplier) {
    return new SpliteratorTester<>(
        ImmutableSet.of(
            () -> new GeneralSpliteratorOfObject<>(spliteratorSupplier.get()),

  }

  /**
   * @since 28.1 (but only since 33.4.0 in the Android flavor)
   */
  public static SpliteratorTester<Integer> ofInt(Supplier<Spliterator.OfInt> spliteratorSupplier) {
    return new SpliteratorTester<>(
        ImmutableSet.of(
            () -> new GeneralSpliteratorOfObject<>(spliteratorSupplier.get()),

    long estimatedSize = 0L;
    ImmutableList.Builder<Spliterator.OfInt> splitrsBuilder =
        new ImmutableList.Builder<>(streams.length);
    for (IntStream stream : streams) {
      isParallel |= stream.isParallel();
      Spliterator.OfInt splitr = stream.spliterator();
      splitrsBuilder.add(splitr);
      characteristics &= splitr.characteristics();

    long estimatedSize = 0L;
    ImmutableList.Builder<Spliterator.OfInt> splitrsBuilder =
        new ImmutableList.Builder<>(streams.length);
    for (IntStream stream : streams) {
      isParallel |= stream.isParallel();
      Spliterator.OfInt splitr = stream.spliterator();
      splitrsBuilder.add(splitr);
      characteristics &= splitr.characteristics();

     */
    @IgnoreJRERequirement // Users will use this only if they're already using streams.
    @CanIgnoreReturnValue
    public Builder addAll(IntStream stream) {
      Spliterator.OfInt spliterator = stream.spliterator();
      long size = spliterator.getExactSizeIfKnown();
      if (size > 0) { // known *and* nonempty
        ensureRoomFor(Ints.saturatedCast(size));
      }

        .containsExactly(0, 1, 3, 6, 10, 15, 21)
        .inOrder();
  }

  public void testAsListIterator() {
    PrimitiveIterator.OfInt intIterator =
        (PrimitiveIterator.OfInt) ImmutableIntArray.of(1, 2, 3).asList().iterator();
    assertThat(intIterator.nextInt()).isEqualTo(1);
    assertThat(intIterator.nextInt()).isEqualTo(2);
    assertThat(intIterator.nextInt()).isEqualTo(3);

    /*
     * This is an override that is not directly visible to callers, so NewApi will catch calls to
     * Collection.spliterator() where necessary.
     */
    @IgnoreJRERequirement
    public Spliterator.OfInt spliterator() {
      return Spliterators.spliterator(array, start, end, 0);
    }

    @Override
    public boolean contains(@Nullable Object target) {
      // Overridden to prevent a ton of boxing