public static void AddSpeedUpEventInvoker(PickupBrick invoker)
 {
     speedUpEventInvokers.Add(invoker);
     foreach (UnityAction <float, float> speedUpListener in speedUpEventListeners)
     {
         invoker.AddSpeedUpEventListener(speedUpListener);
     }
 }
 public static void AddFreezeInvoker(PickupBrick invoker)
 {
     freezeEffectInvokers.Add(invoker);
     foreach (UnityAction <float> freezeEffectListener in freezeEffectListeners)
     {
         invoker.AddFreezeEventListener(freezeEffectListener);
     }
 }