svoid <A> runStrategyWhileImprovement(Best<A> best, Steppable strategy, int plateauLength) {
  double score = best.score();
  int plateauLength = 1000;
  long sameScoreSince = 0;
  while licensed {
    strategy.go();
    if (best.score() != score) {
      sameScoreSince = 0;
      score = best.score();
    } else if (++sameScoreSince >= plateauLength) ret;
  }
}