code: public TimerScheduleType<TimerType<T>> getOrCreateSchedule()
     {
        Node node = childNode.getOrCreate("schedule");
        TimerScheduleType<TimerType<T>> schedule = new TimerScheduleTypeImpl<TimerType<T>>(this, "schedule", childNode, node);
        return schedule;
     }
docs: If not already created, a new <code>schedule</code> element with the given value will be created.
  Otherwise, the existing <code>schedule</code> element will be returned.
  @return  a new or existing instance of <code>TimerScheduleType<TimerType<T>></code>