}

    @Override
    public void renderSummaryTo(ClassDoc classDoc, Element parent) {
        Document document = parent.getOwnerDocument();

        Element summarySection = document.createElement("section");
        parent.appendChild(summarySection);

        Element title = document.createElement("title");
        summarySection.appendChild(title);

        MetadataTreeNode parent = null;

        for (ArtifactMetadata md : classpath) {
            MetadataTreeNode node = new MetadataTreeNode(md, parent, md.isResolved(), md.getArtifactScope());
            if (tree == null) {
                tree = node;
            }

            if (parent != null) {
                parent.setNChildren(1);
                parent.addChild(0, node);
            }

<project>
  <parent>
    <artifactId>p0</artifactId>
    <groupId>maven</groupId>
    <version>1.0</version>
    <relativePath>../../pom.xml</relativePath>
  </parent>
  <modelVersion>4.0.0</modelVersion>
  <artifactId>p1</artifactId>

                        <version>1.0.0</version>
                    </parent>
                    <artifactId>child-project</artifactId>
                    <!-- groupId and version inherited from parent -->
                </project>
                """;

            Document document = Document.of(pomXml);
            UpgradeContext context = createMockContext();

    public BaseObject(Object delegate, BaseObject parent) {
        this.delegate = requireNonNull(delegate, "delegate cannot be null");
        this.childrenTracking = parent != null ? parent::replace : null;
    }

    public BaseObject(Object delegate, ChildrenTracking parent) {
        this.delegate = requireNonNull(delegate, "delegate cannot be null");
        this.childrenTracking = parent;
    }

    public Object getDelegate() {

public class ElementWarningsRenderer {
    public void renderTo(DslElementDoc elementDoc, String type, Element parent) {
        if (elementDoc.isDeprecated()) {
            Document document = parent.getOwnerDocument();
            Element caution = document.createElement("caution");
            parent.appendChild(caution);
            Element para = document.createElement("para");
            caution.appendChild(para);

    /**
     * Merges values from the specified parent model into the given child model. Implementations are expected to keep
     * parent and child completely decoupled by injecting deep copies of objects into the child rather than the original
     * objects from the parent.
     *
     * @param child The child model into which to merge the values inherited from the parent, must not be
     *            <code>null</code>.

    void testRequestTraceCreation() {
        RequestTrace parentTrace = new RequestTrace("parent-context", null, "parent-data");
        RequestTrace childTrace = new RequestTrace("child-context", parentTrace, "child-data");

        assertEquals("parent-context", parentTrace.context());
        assertNull(parentTrace.parent());
        assertEquals("parent-data", parentTrace.data());

        assertEquals("child-context", childTrace.context());

    }

    @Override
    public void renderSummaryTo(ClassDoc classDoc, Element parent) {
        Document document = parent.getOwnerDocument();

        Element summarySection = document.createElement("section");
        parent.appendChild(summarySection);

        Element title = document.createElement("title");
        summarySection.appendChild(title);

    }

    public void renderTo(ClassExtensionDoc extension, Element parent) {
        if (extension.getExtensionBlocks().isEmpty()) {
            return;
        }

        Document document = parent.getOwnerDocument();

        Element section = document.createElement("section");
        parent.appendChild(section);

        Element title = document.createElement("title");