backingCharacteristics &=
            Spliterator.SIZED
                | Spliterator.SUBSIZED
                | Spliterator.ORDERED
                | Spliterator.IMMUTABLE
                | Spliterator.CONCURRENT;
        return characteristics | backingCharacteristics;
      }
    };
  }

  /** Returns a {@code Spliterator} filtered by the specified predicate. */

      public int characteristics() {
        return fromSpliterator.characteristics()
            & ~(Spliterator.DISTINCT | Spliterator.NONNULL | Spliterator.SORTED);
      }
    };
  }

  /** Returns a {@code Spliterator} filtered by the specified predicate. */
  static <T extends @Nullable Object> Spliterator<T> filter(
      Spliterator<T> fromSpliterator, Predicate<? super T> predicate) {
    checkNotNull(fromSpliterator);

    Spliterator<A> splitrA = streamA.spliterator();
    Spliterator<B> splitrB = streamB.spliterator();
    int characteristics =
        splitrA.characteristics()
            & splitrB.characteristics()
            & (Spliterator.SIZED | Spliterator.ORDERED);
    Iterator<A> itrA = Spliterators.iterator(splitrA);
    Iterator<B> itrB = Spliterators.iterator(splitrB);
    return StreamSupport.stream(

  private abstract static class GeneralSpliterator<E extends @Nullable Object> {
    final Spliterator<E> spliterator;

    GeneralSpliterator(Spliterator<E> spliterator) {
      this.spliterator = checkNotNull(spliterator);
    }

    abstract void forEachRemaining(Consumer<? super E> action);

    abstract boolean tryAdvance(Consumer<? super E> action);

     * they were given.
     */
    void inOrder();
  }

  private abstract static class GeneralSpliterator<E extends @Nullable Object> {
    final Spliterator<E> spliterator;

    GeneralSpliterator(Spliterator<E> spliterator) {
      this.spliterator = checkNotNull(spliterator);
    }

    abstract void forEachRemaining(Consumer<? super E> action);

    abstract boolean tryAdvance(Consumer<? super E> action);

    Spliterator<A> splitrA = streamA.spliterator();
    Spliterator<B> splitrB = streamB.spliterator();
    int characteristics =
        splitrA.characteristics()
            & splitrB.characteristics()
            & (Spliterator.SIZED | Spliterator.ORDERED);
    Iterator<A> itrA = Spliterators.iterator(splitrA);
    Iterator<B> itrB = Spliterators.iterator(splitrB);
    return StreamSupport.stream(

  }

  @Override
  Set<Entry<K, V>> createEntrySet() {
    @WeakOuter
    final class EntrySetImpl extends EntrySetView {
      @Override
      public Spliterator<Entry<K, V>> spliterator() {
        return Spliterators.spliterator(this, Spliterator.ORDERED | Spliterator.DISTINCT);
      }
    }
    return new EntrySetImpl();
  }

  @Override
  Set<K> createKeySet() {
    @WeakOuter

      iterable.forEach(action);
    }

    @SuppressWarnings("unchecked") // safe upcast, assuming no one has a crazy Spliterator subclass
    @Override
    public Spliterator<T> spliterator() {
      return (Spliterator<T>) iterable.spliterator();
    }

    @Override
    public String toString() {
      return iterable.toString();
    }

        return new AsMapIterator();
      }

      @Override
      public Spliterator<Entry<K, Collection<V>>> spliterator() {
        return CollectSpliterators.map(
            submap.entrySet().spliterator(),
            Spliterator.DISTINCT | Spliterator.NONNULL,
            AsMap.this::wrapEntry);
      }

      // The following methods are included for performance.

    }

    @Override
    public Spliterator<K> spliterator() {
      if (needsAllocArrays()) {
        return Spliterators.spliterator(new Object[0], Spliterator.DISTINCT | Spliterator.ORDERED);
      }
      Map<K, V> delegate = delegateOrNull();
      return (delegate != null)
          ? delegate.keySet().spliterator()
          : Spliterators.spliterator(