}};
SelectField<Integer> cityField = new SelectField<Integer>("city", Integer.class, cities, "City");
cityField.setValidators(notNull());
final Form form = new Form();
form.addFields(firstNameField, lastNameField, emailField, street1Field, street2Field, cityField);
FieldGroup generalGroup = new FieldGroup("firstName", "lastName", "email");
// generalGroup.setLayoutHints(new LayoutHints().setEditorWidth("100%"));
FieldGroup addressGroup = new FieldGroup("Address", new String[]{"street1", "street2", "city"});