String nodeString = networkString.substring(nodeStart, edgeStart);
    String edgeString = networkString.substring(edgeStart);

    Graph<N> asGraph = network.asGraph();
    AbstractGraphTest.validateGraph(asGraph);
    assertThat(network.nodes()).isEqualTo(asGraph.nodes());
    assertThat(network.edges().size()).isAtLeast(asGraph.edges().size());
    assertThat(network.nodeOrder()).isEqualTo(asGraph.nodeOrder());