}

    private String getStackTrace(final Throwable t) {
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        try (final StringWriter sw = new StringWriter(); final PrintWriter pw = new PrintWriter(sw)) {
            t.printStackTrace(pw);
            pw.flush();
            return systemHelper.abbreviateLongText(sw.toString());
        } catch (final IOException e) {

    }

    // Package protected for test
    static String toMessage(String modelId, List<ModelProblem> problems) {
        StringWriter buffer = new StringWriter(1024);

        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 model");

        PrintWriter pWriter = new PrintWriter(sWriter);

        error.printStackTrace(pWriter);

        System.out.println("[" + prefix + "] " + sWriter.toString());
    }

    private void print(String prefix, CharSequence content, Throwable error) {
        StringWriter sWriter = new StringWriter();
        PrintWriter pWriter = new PrintWriter(sWriter);

 */
public class ProtoLogger implements Logger {

    private final PrintWriter out;
    private final PrintWriter err;

    public ProtoLogger() {
        this(null, null);
    }

    public ProtoLogger(@Nullable OutputStream out, @Nullable OutputStream err) {
        this.out = new PrintWriter(toPsOrDef(out, System.out), true);
        this.err = new PrintWriter(toPsOrDef(err, System.err), true);
    }

    protected final MessageBuilderFactory messageBuilderFactory;
    protected final PrintWriter out;

    protected AbstractMavenTransferListener(MessageBuilderFactory messageBuilderFactory, PrintStream out) {
        this(messageBuilderFactory, new PrintWriter(out));
    }

    protected AbstractMavenTransferListener(MessageBuilderFactory messageBuilderFactory, PrintWriter out) {
        this.messageBuilderFactory = messageBuilderFactory;

    public List<Problem> getProblems() {
        return problems;
    }

    private static String toMessage(List<Problem> problems) {
        StringWriter buffer = new StringWriter(1024);

        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 toolchains");

     * Emits warning messages if deprecated options are used.
     *
     * @param printWriter the string consumer to use for output
     */
    default void warnAboutDeprecatedOptions(@Nonnull ParserRequest request, @Nonnull Consumer<String> printWriter) {}

    /**
     * Displays help information for these options.
     *
     * @param printWriter the string consumer to use for output
     */

        return problems;
    }

    private static String toMessage(List<SettingsProblem> problems) {
        StringWriter buffer = new StringWriter(1024);

        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");

        return buf;
    }

    protected StringBuilder appendException(final StringBuilder buf, final Exception exception) {
        try (ByteArrayOutputStream baos = new ByteArrayOutputStream();
                PrintWriter writer = new PrintWriter(baos, false, Constants.CHARSET_UTF_8)) {
            exception.printStackTrace(writer);
            writer.flush();

        List<O> parsedOptions = parseCliOptions(context);

        // warn about deprecated options
        PrintWriter printWriter = new PrintWriter(parserRequest.out() != null ? parserRequest.out() : System.out, true);
        parsedOptions.forEach(o -> o.warnAboutDeprecatedOptions(parserRequest, printWriter::println));

        // assemble options if needed
        context.options = assembleOptions(parsedOptions);