package cnp.ew.util;

public interface CpObservable
{
    public void addObserver(CpObserver o);
    public void removeObserver(CpObserver o);
    public void notifyObservers();
    public void notifyObservers(Object arg);
    public void notifyObservers(int facet);
    public void notifyObservers(int facet, Object arg);
}