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static <A> void runStrategyWhileImprovement(Best<A> best, Steppable strategy) {
  double score = best.score();
  int plateauLength = 1000;
  long sameScoreSince = 0;
  while licensed {
    if (strategy.step()) ret;
    if (best.score() != score) {
      print("Improvement after " + n2(sameScoreSince, "round") + ": " + best);
      sameScoreSince = 0;
      score = best.score();
    } else if (++sameScoreSince >= plateauLength) ret;
  }
}