sclass Probabilistic implements IProbabilistic {
  IProbabilisticScheduler ps;
  
  public void setScheduler(IProbabilisticScheduler ps) {
    this.ps = ps;
  }
  
  void schedule(double probability, Runnable action) {
    ps.at(probability, action);
  }
  
  void scheduleAll(double probability, Iterabel<Runnable> actions) {
    forEach(actions, a -> schedule(probability, a));
  }
}