@Override
public boolean remove(Object o) {
modCount++;
relation.remove(listHolder, (E2) o);
// HACK!!! What to return here?
// I wouldn't like to force a load of the list to be able to return the correct boolean value
return true;
}
@Override
public void add(int index, E2 element) {
relation.add(listHolder, element);
modCount++;
}