svoid g22_runPostAnalysisLeftArrowScript(Gazelle22_ImageToRegions itr,
  GazelleV_LeftArrowScript.Script script) {
  if (script == null) ret;
  
  pcall {
    // def score region { ... }
    
    var fScore = script.getFunction("score");
    if (fScore != null) {
      L<IImageRegion> regions = itr.regions.regions();
      int n = l(regions);
      new Map<IImageRegion, Double> scores;
      for (region : regions)
        scores.put(region, toDouble(fScore.call(null, region)));
      itr.scoredRegions = mapSortedByValue(scores);
    }
  }
}