*/
@RequestMapping(method = RequestMethod.POST, params = "action=subscribeToTab")
public ModelAndView subscribeToTab(HttpServletRequest request,
HttpServletResponse response) throws IOException {
IUserInstance ui = userInstanceManager.getUserInstance(request);
IPerson per = getPerson(ui, response);
UserPreferencesManager upm = (UserPreferencesManager) ui.getPreferencesManager();
IUserLayoutManager ulm = upm.getUserLayoutManager();
// Get the fragment owner's name from the request and construct
// an IPerson object representing that user
String fragmentOwnerName = request.getParameter("sourceID");