docs: public final static <T> Stream<Seq<T>> groupedBySizeAndTime(final Stream<T> stream, final int size, final long time, final TimeUnit t) {
          return StreamSupport.stream(new GroupedByTimeAndSizeSpliterator(stream.spliterator(),()->Seq.fromIterable(new ArrayList<>(size)),
                  Function.identity(),size,time,t),stream.isParallel());
      }