public static TimerUpdate empty(){
  return new TimerUpdate(null,Collections.<TimerData>emptyList(),Collections.<TimerData>emptyList(),Collections.<TimerData>emptyList());
}

public static TimerUpdate empty ( ) { return new TimerUpdate ( null , Collections . < TimerData > emptyList ( ) , Collections . < TimerData > emptyList ( ) , Collections . < TimerData > emptyList ( ) ) ; }
returns a timerupdate for a null key with no timers .
