}

    @Override
    public void warnAboutDeprecatedOptions(ParserRequest request, Consumer<String> printWriter) {}

    @Override
    public void displayHelp(ParserRequest request, Consumer<String> printWriter) {
        options.get(0).displayHelp(request, printWriter);
    }

    protected <T> Optional<T> returnFirstPresentOrEmpty(Function<O, Optional<T>> getter) {
        for (O option : options) {

    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
     */

     */
    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();

        }
        buf.append(enc);
        final HttpServletResponse response = LaResponseUtil.getResponse();
        response.setContentType(buf.toString());
        writeHeaders(response);
        try (PrintWriter out = new PrintWriter(new OutputStreamWriter(response.getOutputStream(), enc))) {
            out.print(text);
        } catch (final IOException e) {
            throw new IORuntimeException(e);
        }
    }

        }
        return null;
    }

    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");

                sb.append(cause.getClass().getName());
            } else {
                sb.append(cause.getMessage());
            }
            try (final StringWriter sw = new StringWriter(); final PrintWriter pw = new PrintWriter(sw)) {
                cause.printStackTrace(pw);
                pw.flush();
                sb.append(" [ ").append(sw.toString()).append(" ]");
            } catch (final IOException ignore) {}

        return rootCause;
    }

    @Override
    public String toString() {
        if (rootCause != null) {
            final StringWriter sw = new StringWriter();
            final PrintWriter pw = new PrintWriter(sw);
            rootCause.printStackTrace(pw);
            return super.toString() + "\n" + sw;
        }
        return super.toString();
    }

    // Check that we can find a resource if it is visible to the context class
    // loader, even if it is not visible to the loader of the Resources class.

    File tempFile = createTempFile();
    PrintWriter writer = new PrintWriter(tempFile, "UTF-8");
    writer.println("rud a chur ar an méar fhada");
    writer.close();

    // First check that we can't find it without setting the context loader.

                }
            });

        if (errors.isEmpty()) {
            return;
        }

        try {
            try (PrintWriter pw = new PrintWriter(getReport())) {
                pw.println("---------- Validation Report -----------");
                pw.println("Some API names were found that, when client code is generated for these APIS,");