static Rect iiWiggle(IntegralImage ii, Rect r, int dx, int dy, IF1<Rect, Double> score) {
  L<Rect> l = ll(r, translateRect(r, dx, dy), translateRect(r, -dx, -dy));
  l = rectsFullyContainedIn(l, iiRect(ii));
  ret highestByFunction(r2 ->  score.get(r2), l);
}