private void loadTableDataFor(User u) {
   reloadTableData();
   for (int i = 0; i < weeklyEvents.size(); i++) {
     WeeklyEvent we = weeklyEvents.get(i);
     if (!we.getCourse().getParticipants().contains(u)) {
       weeklyEvents.remove(we);
       i--;
     }
   }
 }
 public WeeklyEventTableModel() {
   reloadTableData();
 }