* @param resultHandler
* a <code>Receiver</code> that will be asked to handle the downloaded structure
* information.
*/
public void refresh(final SelectedObjectClasses classes, final Receiver<SelectedObjectStructures> resultHandler) {
GetLdapStructuresCallback callback = new GetLdapStructuresCallback() {
@Override
public void structuresRetrieved(ObjectClassStructure[] retrieved) {
SelectedObjectStructures structures = new SelectedObjectStructures(classes);
for (ObjectClassStructure struct : retrieved) {