public void RemoveTimer(IControlledTimer timer)
 {
     timers.Remove(timer);
 }
 public void RemoveTimer(IControlledTimer timer)
 {
     timers.Remove(timer);
 }
 public void AddTimer(IControlledTimer timer)
 {
     timers.Add(timer);
 }
 public void AddTimer(IControlledTimer timer)
 {
     timers.Add(timer);
 }