code: public static IteratingRLW32 bufferedor(final int bufSize,
                                              final IteratingRLW32... al) {
          if (al.length == 0)
              throw new IllegalArgumentException(
                      "Need at least one iterator");
          if (al.length == 1)
              return al[0];
  
          final LinkedList<IteratingRLW32> basell = new LinkedList<IteratingRLW32>();
          Collections.addAll(basell, al);
          return new BufferedIterator32(new ORIt(basell, bufSize));
      }
docs: Aggregate the iterators using a bitmap buffer.
  
  @param al      iterators to aggregate
  @param bufSize size of the internal buffer used by the iterator in
  64-bit words
  @return or aggregate