| Interface Summary | 
| CancelTimerListener | This is implemented by developers that require a cancel event. | 
| StopTimerListener | Applications requiring timer stop events should have their timers
 implement this interface. | 
| Timer | A Timer is returned when a TimerListener
 is scheduled using one of the TimerManager.schedulemethods. | 
| TimerListener | Objects that implement this interface and are supplied
 to one of the TimerManager#schedulemethods can receieve timer
 notifications. | 
| TimerManager | Applications use a TimerManager to schedule TimerListeners. |