static <T extends @Nullable Object> Spliterator<T> indexed(
      int size, int extraCharacteristics, IntFunction<T> function) {
    return indexed(size, extraCharacteristics, function, null);
  }

  static <T extends @Nullable Object> Spliterator<T> indexed(
      int size,
      int extraCharacteristics,
      IntFunction<T> function,
      @Nullable Comparator<? super T> comparator) {
    if (comparator != null) {

  static <T extends @Nullable Object> Spliterator<T> indexed(
      int size, int extraCharacteristics, IntFunction<T> function) {
    return indexed(size, extraCharacteristics, function, null);
  }

  static <T extends @Nullable Object> Spliterator<T> indexed(
      int size,
      int extraCharacteristics,
      IntFunction<T> function,
      @Nullable Comparator<? super T> comparator) {
    if (comparator != null) {

      return (Predicate<Object>) v -> (boolean) getDefaultValue(TypeToken.of(boolean.class));
    } else if (rawType.equals(IntFunction.class)) {
      try {
        Method method = IntFunction.class.getMethod("apply", int.class);
        return (IntFunction<Object>) v -> getDefaultValue(type.method(method).getReturnType());
      } catch (NoSuchMethodException e) {
        throw newLinkageError(e);
      }

      return fromSpliterator.characteristics()
          & (Spliterator.ORDERED | Spliterator.SIZED | Spliterator.SUBSIZED);
    }
  }

  /**
   * An analogue of {@link java.util.function.IntFunction} also accepting an index.
   *
   * <p>This interface is only intended for use by callers of {@link #mapWithIndex(IntStream,
   * IntFunctionWithIndex)}.
   *
   * @since 33.4.0 (but since 21.0 in the JRE flavor)

      return fromSpliterator.characteristics()
          & (Spliterator.ORDERED | Spliterator.SIZED | Spliterator.SUBSIZED);
    }
  }

  /**
   * An analogue of {@link java.util.function.IntFunction} also accepting an index.
   *
   * <p>This interface is only intended for use by callers of {@link #mapWithIndex(IntStream,
   * IntFunctionWithIndex)}.
   *