contentForm.setHeaderVisible(false);
contentForm.setButtonAlign(HorizontalAlignment.CENTER);
grid.setWidget(0, 0, adminFieldset);
grid.setWidget(0, 1, chantierFieldset);
contentForm.add(grid);
contentForm.addButton(btnValider);
contentForm.addButton(btnAnnuler);
service.findAll(new AsyncCallbackWithErrorResolution<List<UtilisateurGrpModel>>() {
@Override
public void onSuccess(List<UtilisateurGrpModel> result) {
}