GraphBuilder.undirected().incidentEdgeOrder(ElementOrder.unordered()).build());

    assertThat(graph.incidentEdgeOrder()).isEqualTo(ElementOrder.stable());
  }

  @Test
  public void immutableGraphBuilder_addNode() {
    ImmutableGraph<String> graph = GraphBuilder.directed().<String>immutable().addNode("A").build();

    assertThat(graph.nodes()).containsExactly("A");
    assertThat(graph.edges()).isEmpty();
  }