@Override
public Iterator<Pair<Long, ByteBuffer>> all()
{
int N = buffers.size() ;
Iterator<Long> iter = new IteratorInteger(0,N) ;
Transform<Long, Pair<Long, ByteBuffer>> transform = new Transform<Long, Pair<Long, ByteBuffer>>() {
@Override
public Pair<Long, ByteBuffer> convert(Long item)
{
ByteBuffer bb = buffers.get(item.intValue()) ;