<E extends @Nullable Object> void forEach(
          GeneralSpliterator<E> spliterator, Consumer<? super E> consumer) {
        for (GeneralSpliterator<E> prefix = trySplitTestingSize(spliterator);
            prefix != null;
            prefix = trySplitTestingSize(spliterator)) {
          forEach(prefix, consumer);
        }
        long size = spliterator.getExactSizeIfKnown();
        long[] counter = {0};