this.callback = callback;
    }

    @Override
    public void configure(Binder binder) {
        if (extension.getKey() != null) {
            XmlNode configuration = extension.getConfiguration();
            if (configuration == null) {
                configuration = XmlNode.newInstance("configuration");
            }
            UnaryOperator<String> cb = Interpolator.memoize(callback);

     */
    @Nullable
    public static XmlNode merge(XmlNode dominant, XmlNode recessive) {
        return merge(dominant, recessive, null);
    }

    /**
     * Merges two XML nodes.
     */
    @Nullable
    public static XmlNode merge(
            @Nullable XmlNode dominant, @Nullable XmlNode recessive, @Nullable Boolean childMergeOverride) {

        this.callback = callback;
    }

    @Override
    public void configure(Binder binder) {
        if (extension.getKey() != null) {
            XmlNode configuration = extension.getConfiguration();
            if (configuration == null) {
                configuration = XmlNode.newInstance("configuration");
            }
            UnaryOperator<String> cb = Interpolator.memoize(callback);

            XmlNode pomConfiguration = null;

            if (pluginExecution != null) {
                pomConfiguration = pluginExecution.getDelegate().getConfiguration();
            } else if (allowPluginLevelConfig) {
                pomConfiguration = plugin.getDelegate().getConfiguration();
            }

            XmlNode mojoConfiguration = mojoExecution.getConfiguration() != null

        if (object instanceof org.codehaus.plexus.util.xml.Xpp3Dom xpp3Dom) {
            object = xpp3Dom.getDom();
        }
        if (object instanceof XmlNode xmlNode) {
            return new Xpp3DomNodePointer(xmlNode);
        }
        return null;
    }

    @Override
    public NodePointer createNodePointer(NodePointer parent, QName name, Object object) {

    }

    @Override
    public void configure(Binder binder) {
        if (plugin.getKey() != null) {
            XmlNode configuration = plugin.getConfiguration();
            if (configuration == null) {
                configuration = XmlNode.newInstance("configuration");
            }
            binder.bind(XmlNode.class)
                    .annotatedWith(Names.named(plugin.getKey()))
                    .toInstance(configuration);

import org.apache.maven.api.xml.XmlNode;
import org.codehaus.plexus.util.xml.Xpp3Dom;

/**
 * A node iterator for JXPath to support <code>Xpp3Dom</code>.
 *
 */
class Xpp3DomNodeIterator implements NodeIterator {

    private NodePointer parent;

    private NodeTest test;

    private XmlNode node;

    private List<XmlNode> children;

    private List<XmlNode> filteredChildren = new ArrayList<>();

    private final Set<String> packages;

    private final String key;

    private final XmlNode configuration;

    public CoreExtensionEntry(
            ClassRealm realm,
            Collection<String> artifacts,
            Collection<String> packages,
            String key,
            XmlNode configuration) {
        this.realm = realm;

    }

    @Override
    public int compareChildNodePointers(NodePointer pointer1, NodePointer pointer2) {
        XmlNode node1 = (XmlNode) pointer1.getBaseValue();
        XmlNode node2 = (XmlNode) pointer2.getBaseValue();
        if (node1 == node2) {
            return 0;
        }
        for (XmlNode child : node.children()) {
            if (child == node1) {
                return -1;
            }
            if (child == node2) {

        return extensionDescriptor;
    }

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

        if (dom != null) {
            strings = new ArrayList<>();

            for (XmlNode child : dom.children()) {
                String string = child.value();
                if (string != null) {