public void BeginDuckSimulator(SingleDuckSimulator duckSim)
 {
     _singleDuckSimulators.Add(duckSim);
     duckSim.Begin();
 }
 public static SingleDuckSimulator GetSingleSimulator(Duck d, int quackDelay, int flyAwayDelay)
 {
     var simDuck = new SingleDuckSimulator {Duck = d, SecondsDelay = quackDelay, SecondsTilFlyAway = flyAwayDelay};
     return simDuck;
 }