@Override
    public void execute(GraphModel graphModel) {
        Graph graph = graphModel.getUndirectedGraphVisible();
        execute(graph);
    }
@Test
    public void testColumnReplace() {
        GraphModel graphModel = GraphGenerator.generateNullUndirectedGraph(1);

        graphModel.getNodeTable().addColumn(Modularity.MODULARITY_CLASS, String.class);

        Modularity h = new Modularity();
        h.execute(graphModel);
    }