//add(new Label("heading", isTeacher ? "Tags " + " (" + targetUser.getFullName() + ")" : "Tags"));
add(new WebMarkupContainer("noTagSelected").setVisible((selected == null) && (targetUser != null)));
add(new WebMarkupContainer("noStudentSelected").setVisible(targetUser == null));
TagCloudAlternateView tcav = new TagCloudAlternateView("tagCloud", selected);
tcav.setTargetUser(targetUser);
tcav.setVisible(targetUser != null);
add(tcav);
add(new RefreshingView<Tagging>("items") {
private static final long serialVersionUID = 1L;