*/
@Test(expected = UnsupportedOperationException.class)
public void testGetUsersIListSettings() {
AttributeInfo info = new AttributeInfo();
info.setId("uid"); //$NON-NLS-1$
Attribute attribute = new Attribute();
attribute.setAttributeInfo(info);
attribute.setValue("a a"); //$NON-NLS-1$
UserSearchCritieria critieria = new UserSearchCritieria();
critieria.addAttribute(attribute);
UserListingSettings settings = new UserListingSettings();
settings.setCriteria(critieria);
Collection<IUser> users = userManager.getUsers(settings);