protected void createSessionsTable(List<Session> sessions) {
   table().attr("cellpadding", "0", "cellspacing", "0", "border", "0", "class", "display");
   thead();
   tr();
   createThs("Id", "Last Used");
   end();
   end();
   tbody();
   for (Session s : sessions) {
     tr();
     createTds(s.getId(), formatDurationHMS(System.currentTimeMillis() - s.getLastUsed()));
     end();
   }
   end();
   end();
 }