section.appendChild(title);
        title.appendChild(document.createTextNode("Properties added by the "));
        Element literal = document.createElement("literal");
        title.appendChild(literal);
        literal.appendChild(document.createTextNode(extension.getPluginId()));
        title.appendChild(document.createTextNode(" plugin"));

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

        section.appendChild(title);
        Element literal = document.createElement("literal");
        title.appendChild(literal);
        literal.appendChild(document.createTextNode(blockDoc.getName()));
        title.appendChild(document.createTextNode(" { }"));

        warningsRenderer.renderTo(blockDoc, "script block", section);

        for (Element element : blockDoc.getComment()) {

        thead.appendChild(tr);
        Element td = document.createElement("td");
        tr.appendChild(td);
        td.appendChild(document.createTextNode("Property"));
        td = document.createElement("td");
        tr.appendChild(td);
        td.appendChild(document.createTextNode("Description"));

        for (PropertyDoc propDoc : properties) {
            // <tr>

        thead.appendChild(tr);
        Element td = document.createElement("td");
        tr.appendChild(td);
        td.appendChild(document.createTextNode("Method"));
        td = document.createElement("td");
        tr.appendChild(td);
        td.appendChild(document.createTextNode("Description"));

        for (MethodDoc methodDoc : methods) {
            // <tr>

            listener.warning(String.format("Unsupported Javadoc tag '%s'", tag));
            Element element = document.createElement("UNHANDLED-TAG");
            element.appendChild(document.createTextNode(String.format("{@%s %s}", tag, value)));
            nodes.appendChild(element);
            return true;
        }
    }

    private static class UnknownHtmlElementHandler implements HtmlElementHandler {

            fixProgramListings(doc)
        }
    }

    def addVersionInfo(Document doc) {
        Element releaseInfo = doc.createElement('releaseinfo')
        releaseInfo.appendChild(doc.createTextNode(version.get().toString()))
        doc.documentElement.bookinfo[0]?.appendChild(releaseInfo)
    }

    def fixProgramListings(Document doc) {

        parent.appendChild(summarySection);

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

        Collection<PropertyDoc> classProperties = classDoc.getClassProperties();
        if (!classProperties.isEmpty()) {

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

            element.appendChild(document.createTextNode(targetClass.getClassName() + ":" + parts[1]));
            return element;
        }

        return createLiteralNode(value);
    }

    private Node createLiteralNode(String value) {
        Element element = document.createElement("literal");
        element.appendChild(document.createTextNode(value));
        return element;
    }

        Document document = parent.getOwnerDocument();

        Element title = document.createElement("title");
        parent.appendChild(title);
        title.appendChild(document.createTextNode(classDoc.getSimpleName()));

        addApiDocumentationLink(classDoc, parent, document);
        addSubtypeLinks(classDoc, parent, document);

        warningsRenderer.renderTo(classDoc, "class", parent);

            ws.onmessage = function(event) {
                var messages = document.getElementById('messages')
                var message = document.createElement('li')
                var content = document.createTextNode(event.data)
                message.appendChild(content)
                messages.appendChild(message)
            };
            function sendMessage(event) {