for (Plugin plugin : plugins) {
            XmlNode pluginConfiguration = plugin.getDelegate().getConfiguration();

            if (pluginConfiguration != null) {
                for (PluginExecution execution : plugin.getExecutions()) {
                    XmlNode executionConfiguration = execution.getDelegate().getConfiguration();
                    executionConfiguration = XmlNode.merge(executionConfiguration, pluginConfiguration);

    }

    static class ExtensionInterpolator extends MavenTransformer {
        ExtensionInterpolator(Function<String, String> transformer) {
            super(transformer);
        }

        public XmlNode transform(XmlNode node) {
            return super.transform(node);
        }
    }

    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;

                XmlNode parentDom = reportPlugin.getDelegate().getConfiguration();

                if (parentDom != null) {
                    for (ReportSet execution : reportPlugin.getReportSets()) {
                        XmlNode childDom = execution.getDelegate().getConfiguration();
                        childDom = XmlNode.merge(childDom, parentDom);

                }
            }
        }
        return null;
    }

    private static String mayGetChild(XmlNode node, String child) {
        XmlNode c = node.getChild(child);
        if (c != null) {
            return c.getValue();
        }
        return null;
    }

        Plugin plugin = model.getBuild().getPlugins().get(0);
        XmlNode node = plugin.getConfiguration();
        assertNotNull(node);
        assertEquals("http://maven.apache.org/POM/4.0.0", node.getNamespaceUri());
        assertEquals("m", node.getPrefix());
        assertEquals("configuration", node.getName());
        assertEquals(1, node.getChildren().size());
        XmlNode myConfig = node.getChildren().get(0);

                throw new ComponentConfigurationException("Unable to convert configuration to xml node", e);
            }
        }

        XmlNode toXml(PlexusConfiguration config, ExpressionEvaluator evaluator) throws ExpressionEvaluationException {
            List<XmlNode> children = new ArrayList<>();
            for (PlexusConfiguration c : config.getChildren()) {
                children.add(toXml(c, evaluator));
            }

import org.apache.maven.api.plugin.descriptor.MojoDescriptor;
import org.apache.maven.api.plugin.descriptor.PluginDescriptor;
import org.apache.maven.api.plugin.descriptor.lifecycle.Lifecycle;
import org.apache.maven.api.xml.XmlNode;
import org.codehaus.plexus.util.xml.Xpp3Dom;
import org.eclipse.aether.graph.DependencyNode;

public class DefaultMojoExecution implements MojoExecution {
    private final InternalMavenSession session;

            authSelector.add(server.getId(), authBuilder.build());

            if (server.getConfiguration() != null) {
                XmlNode dom = server.getDelegate().getConfiguration();
                List<XmlNode> children = dom.getChildren().stream()
                        .filter(c -> !"wagonProvider".equals(c.getName()))
                        .collect(Collectors.toList());

import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

import org.apache.maven.api.xml.XmlNode;
import org.apache.maven.internal.xml.XmlNodeStaxBuilder;
import org.apache.maven.internal.xml.XmlPlexusConfiguration;
import org.apache.maven.plugin.descriptor.io.PluginDescriptorStaxReader;