code: public static <Vertex> BiDiNavigator<SCComponent<Vertex>> getSccBiDiNavigator() {
  	return
  	    new BiDiNavigator<SCComponent<Vertex>>() {
  	       public List<SCComponent<Vertex>> next(SCComponent<Vertex> scc) {
  		  return scc.next();
  	       }
  	       public List<SCComponent<Vertex>> prev(SCComponent<Vertex> scc) {
  		  return scc.prev();
  	       }
  	    };
      }
docs: Default navigator through a component graph (a diGraph of
  strongly-connected components).