// A = tag type
srecord noeq USwitchByBrightness<A>(NavigableMap<Double, A> brightnessToAction) {
  void run(
    IProbabilisticScheduler scheduler,
    IIntegralImage img,
    IVF1<A> action) {
    new ProbabilisticDistanceBasedLookup(
      scheduler, brightnessToAction,
      brightness -> action.get(brightnessToAction.get(brightness)),
      img.averageBrightness())
      .run();
  }
}