+ "<exportedPackage>c</exportedPackage>" + "</exportedPackages>" + "<exportedArtifacts>"
                + "<exportedArtifact>x</exportedArtifact>" + "<exportedArtifact>y</exportedArtifact>"
                + "<exportedArtifact> z </exportedArtifact>" + "</exportedArtifacts>" + "</extension>";

        ExtensionDescriptor ed = builder.build(toStream(xml));

        assertNotNull(ed);

                .setJSR250Lifecycle(true)
                .setName("maven");

        Set<String> exportedArtifacts = new HashSet<>(coreEntry.getExportedArtifacts());
        Set<String> exportedPackages = new HashSet<>(coreEntry.getExportedPackages());
        for (CoreExtensionEntry extension : extensions) {
            exportedArtifacts.addAll(extension.getExportedArtifacts());
            exportedPackages.addAll(extension.getExportedPackages());

        if (exportedArtifacts == null) {
            exportedArtifacts = new ArrayList<>();
        }

        return exportedArtifacts;
    }

    public void setExportedArtifacts(List<String> exportedArtifacts) {
        if (exportedArtifacts == null) {
            this.exportedArtifacts = null;
        } else {
            this.exportedArtifacts = new ArrayList<>(exportedArtifacts);
        }

        }

        List<ClassRealm> extensionRealms = new ArrayList<>();

        Map<ClassRealm, List<String>> exportedPackages = new HashMap<>();

        Map<ClassRealm, List<String>> exportedArtifacts = new HashMap<>();

        List<Artifact> publicArtifacts = new ArrayList<>();

        for (Plugin plugin : extensionPlugins) {
            ExtensionRealmCache.CacheRecord recordRealm =

        }

        extensionDescriptor.setExportedPackages(parseStrings(dom.getChild("exportedPackages")));

        extensionDescriptor.setExportedArtifacts(parseStrings(dom.getChild("exportedArtifacts")));

        return extensionDescriptor;
    }

    private List<String> parseStrings(XmlNode dom) {
        List<String> strings = null;

        if (dom != null) {