return Spliterators.spliterator(this, Spliterator.ORDERED | Spliterator.DISTINCT);
      }
    }
    return new KeySetImpl();
  }

  @Override
  Collection<V> createValues() {
    @WeakOuter
    class ValuesImpl extends ValuesView {
      @Override
      public @Nullable Object[] toArray() {
        return ObjectArrays.toArrayImpl(this);
      }

      @Override