}
    }

    @Test
    void testV4Model() {
        assertEquals("4.0.0", new MavenModelVersion().getModelVersion(model));
    }

    @Test
    void testV4ModelVersion() {
        Model m = model.withModelVersion("4.1.0");
        assertEquals("4.0.0", new MavenModelVersion().getModelVersion(m));
    }

    @Test
    void testV4ModelRoot() {
        Model m = model.withRoot(true);

        // Value taken from super model
        // ----------------------------------------------------------------------

        assertEquals("4.0.0", p4.getModelVersion());

        assertEquals("4.0.0", p4.getModelVersion());
    }

        // Top-level elements
        // ----------------------------------------------------------------------

        assertEquals("4.0.0", project.getModelVersion());

        // ----------------------------------------------------------------------
        // Plugins
        // ----------------------------------------------------------------------

        // Value taken from super model
        // ----------------------------------------------------------------------

        assertEquals("4.0.0", project4.getModelVersion());

        Build build = project4.getBuild();
        List<Plugin> plugins = build.getPlugins();

        Map<String, Integer> validPluginCounts = new HashMap<>();

            return new MavenStaxReader().read(is, false, null);
        }
    }

    protected void write(Model model, Path dest) throws IOException, XMLStreamException {
        String version = model.getModelVersion();
        Files.createDirectories(dest.getParent());
        try (Writer w = Files.newBufferedWriter(dest)) {
            MavenStaxWriter writer = new MavenStaxWriter();