PrintWriter writer = new PrintWriter(buffer);

        writer.print(problems.size());
        writer.print((problems.size() == 1) ? " problem was " : " problems were ");
        writer.print("encountered while building the effective settings");
        writer.println();

        for (SettingsProblem problem : problems) {
            writer.print("[");
            writer.print(problem.getSeverity());

    /**
     * Method write.
     *
     * @param writer a writer object.
     * @param model a model object.
     * @throws IOException java.io.IOException if any.
     */
    public void write(Writer writer, Model model) throws IOException {
        try {
            delegate.write(writer, model.getDelegate());
        } catch (XMLStreamException e) {
            throw new IOException(e);

        OutputStream outputStream = request.getOutputStream();
        Writer writer = request.getWriter();
        if (writer == null && outputStream == null && path == null) {
            throw new IllegalArgumentException("writer, outputStream or path must be non null");
        }
        try {
            if (writer != null) {
                new PluginDescriptorStaxWriter().write(writer, content);
            } else if (outputStream != null) {

    }

    @Override
    public void write(Writer output, Map<String, Object> options, Model model) throws IOException {
        Objects.requireNonNull(output, "output cannot be null");
        Objects.requireNonNull(model, "model cannot be null");

        try (Writer out = output) {
            new MavenStaxWriter().write(out, model);
        } catch (XMLStreamException e) {

            return toStringObject();
        }
    }

    public String toStringXml() throws XMLStreamException {
        StringWriter writer = new StringWriter();
        XmlNodeWriter.write(writer, this);
        return writer.toString();
    }

    public String toStringObject() {
        StringBuilder sb = new StringBuilder();
        sb.append("XmlNode[");
        boolean w = false;

    }

    /**
     * Method write.
     *
     * @param writer a writer object.
     * @param settings a settings object.
     * @throws IOException java.io.IOException if any.
     */
    public void write(Writer writer, Settings settings) throws IOException {
        try {
            delegate.write(writer, settings.getDelegate());
        } catch (XMLStreamException e) {

        OutputStream outputStream = request.getOutputStream();
        Writer writer = request.getWriter();
        if (writer == null && outputStream == null) {
            throw new IllegalArgumentException("writer or outputStream must be non null");
        }
        try {
            if (writer != null) {
                new MavenToolchainsStaxWriter().write(writer, content);
            } else {

        public XmlWriterRequestBuilder<T> writer(Writer writer) {
            this.writer = writer;
            return this;
        }

        public XmlWriterRequestBuilder<T> content(T content) {
            this.content = content;
            return this;
        }

        public XmlWriterRequest<T> build() {
            return new DefaultXmlWriterRequest<>(path, outputStream, writer, content);
        }

    }

    /**
     * Method write.
     *
     * @param writer   a writer object
     * @param metadata a Metadata object
     * @throws java.io.IOException java.io.IOException if any
     */
    public void write(Writer writer, Metadata metadata) throws java.io.IOException {
        try {
            delegate.write(writer, metadata.getDelegate());
        } catch (XMLStreamException e) {

        OutputStream outputStream = request.getOutputStream();
        Writer writer = request.getWriter();
        if (writer == null && outputStream == null && path == null) {
            throw new IllegalArgumentException("writer, outputStream or path must be non null");
        }
        try {
            if (writer != null) {
                new MavenStaxWriter().write(writer, content);
            } else if (outputStream != null) {