esAdd() {         DirectedMultigraph<String> g = new DirectedMultigraph<String>();         Set<DirectedTypedEdge<String>> control = new HashSet<DirectedTypedEdge<String>>();         for (int i = 0; i <= 000; ++i) {             DirectedTypedEdge<String> e = new SimpleDirectedTypedEdge<String>("type-0",0, i);             g.add(e);             control.add(e);         }                  Set<DirectedTypedEdge<String>> test = g.getAdjacencyList(0);         assertEquals(control, test);          