@Override
	public Summit<T> getUnvisitedChildren(Summit<T> n) {
		// TODO Auto-generated method stub
		for (Link<T> l : links) {
		    if (l.visited==false && l.start.equals(n)) {
		    	l.visited=true;
		    	return l.end;
		    }
		}
		return null;
	}