code: @Override
    public OperableTrigger instantiate() {
  
      SimpleTriggerImpl st = new SimpleTriggerImpl();
      st.setRepeatInterval(interval);
      st.setRepeatCount(repeatCount);
      st.setMisfireInstruction(misfireInstruction);
      return st;
    }
docs: Build the actual Trigger -- NOT intended to be invoked by end users, but will rather be invoked
  by a TriggerBuilder which this ScheduleBuilder is given to.