package devopsdistilled.operp.client.abstracts;

public interface Model<O extends Observer> {
	public void registerObserver(O observer);

	public void removeObserver(O observer);

	public void notifyObservers();
}

@@ -204,11 +204,35 @@
 rvers();
+%0A%0A%09public void update();
 %0A%7D%0A

Add method update() which is to be called after registerObserver()