: null);
        builder.profiles(prune(model.getProfiles()));

        model = builder.build();
        String modelVersion = new MavenModelVersion().getModelVersion(model);
        if (!ModelBuilder.MODEL_VERSION_4_0_0.equals(modelVersion) && !preserveModelVersion) {
            warnNotDowngraded(project);
        }
        model = model.withModelVersion(modelVersion);

            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();

            // models without a version starting with 3.4.
            validateStringNotEmpty("modelVersion", problems, Severity.ERROR, Version.V20, m.getModelVersion(), m);

            validateModelVersion(problems, m.getModelVersion(), m, "4.0.0");

            validateStringNoExpression("groupId", problems, Severity.WARNING, Version.V20, m.getGroupId(), m);
            if (parent == null) {

    public void setModelVersion(String pomVersion) {
        getModel().setModelVersion(pomVersion);
    }

    public String getModelVersion() {
        return getModel().getModelVersion();
    }

    public String getId() {
        return getModel().getId();
    }

    public void setGroupId(String groupId) {
        getModel().setGroupId(groupId);
    }