});
final DatePicker<String> withDropDownDatePicker = new DatePicker<String>("withDropDownDatePicker", withDropDownDateModel);
withDropDownDatePicker.setChangeMonth(true);
withDropDownDatePicker.setChangeYear(true);
withDropDownDatePicker.setYearRange(new DatePickerYearRange(new Short("-20"), new Short("20"), true));
// Label
withDropDownDatePicker.setLabel(Model.of("Year/month dropdown"));
form.add(withDropDownDatePicker);