code: protected void dispatchOnRangeSelected(@NonNull final List<CalendarDay> days) {
      if (rangeListener != null) {
        rangeListener.onRangeSelected(MaterialCalendarView.this, days);
      }
    }
docs: Dispatch a range of days to a range listener, if set, ordered chronologically.
  
  @param days Enclosing days ordered from first to last day.