protected void OnStepsCollected(StepsData stepsData)
 {
     foreach (IWristbandObserver observer in observers)
     {
         observer.OnWristbandStepsCollected(stepsData);
     }
 }
 public void OnWristbandStepsCollected(StepsData stepsData)
 {
     EventHistory.Add(new WristbandHistoryEvent("OnWristbandStepsCollected > " + stepsData.totalStepsWalked().ToString(), false));
 }