public void detachObserver(IGraphObserver <Vertex> ob) { innerVertObs.Remove(ob); }
public void detachObserver(IGraphObserver <IEdge> ob) { innerEdgeObs.Remove(ob); }
public void attachObserver(IGraphObserver <Vertex> ob) { innerVertObs.Add(ob); }
public void attachObserver(IGraphObserver <IEdge> ob) { innerEdgeObs.Add(ob); }