// TODO tamnd PORTAL-3010 searching a user in the add member form does not work.
String filter = userSelector.getUIFormSelectBox(UIUserSelector.FIELD_FILTER).getValue();
String groupId = userSelector.getSelectedGroup();
userSelector.search(userName, filter, groupId);
// modified by Pham Dinh Tan
// UIListUsers form = (UIListUsers) searchUserPopup.getUIComponent();
// String name = uiGroupForm.getUIStringInput("username").getValue();
// UISearchForm uiSearchForm = form.getUISearchForm();
// uiSearchForm.getUIStringInput("searchTerm").setValue(name);