public E set(int i, E e) {
E old = store.get(i);
E ret = store.set(i, e);
if (old != e) {
for (CollectionObserver<E> o : observers) {
o.removed(host, old);
o.added(host, e);
}
}
return ret;
}
public void add(int i, E e) {
store.add(i, e);
for (CollectionObserver<E> o : observers) {
o.added(host, e);
}
}