}

        public Builder stdOut(OutputStream stdOut) {
            this.stdOut = stdOut;
            return this;
        }

        public Builder stdErr(OutputStream stdErr) {
            this.stdErr = stdErr;
            return this;
        }

        public Builder embedded(boolean embedded) {
            this.embedded = embedded;
            return this;
        }

                System.err.println("stderr: " + stderr);
                System.err.println("===================================================");

                logs.put(goal, stdout.toString());
                if (exception != null) {
                    throw exception;
                } else {
                    assertEquals(0, exitCode, "OUT:" + stdout + "\nERR:" + stderr);
                }
            }

            @Nullable OutputStream stdErr,
            boolean embedded)
            throws IOException {
        try (Invoker invoker = createInvoker()) {
            return invoker.invoke(createParser()
                    .parseInvocation(createParserRequestBuilder(args)
                            .stdIn(stdIn)
                            .stdOut(stdOut)
                            .stdErr(stdErr)

            ClassWorld world,
            @Nullable InputStream stdIn,
            @Nullable OutputStream stdOut,
            @Nullable OutputStream stdErr)
            throws IOException {
        return new MavenUpCling(world).run(args, stdIn, stdOut, stdErr, true);
    }

    public MavenUpCling() {
        super();
    }

    public MavenUpCling(ClassWorld classWorld) {
        super(classWorld);
    }

            ClassWorld world,
            @Nullable InputStream stdIn,
            @Nullable OutputStream stdOut,
            @Nullable OutputStream stdErr)
            throws IOException {
        return new MavenCling(world).run(args, stdIn, stdOut, stdErr, true);
    }

    public MavenCling() {
        super();
    }

    public MavenCling(ClassWorld classWorld) {
        super(classWorld);
    }

            ClassWorld world,
            @Nullable InputStream stdIn,
            @Nullable OutputStream stdOut,
            @Nullable OutputStream stdErr)
            throws IOException {
        return new MavenEncCling(world).run(args, stdIn, stdOut, stdErr, true);
    }

    public MavenEncCling() {
        super();
    }

    public MavenEncCling(ClassWorld classWorld) {
        super(classWorld);
    }

            ClassWorld world,
            @Nullable InputStream stdIn,
            @Nullable OutputStream stdOut,
            @Nullable OutputStream stdErr)
            throws IOException {
        return new MavenShellCling(world).run(args, stdIn, stdOut, stdErr, true);
    }

    public MavenShellCling() {
        super();
    }

    public MavenShellCling(ClassWorld classWorld) {
        super(classWorld);

     *
     * @return an {@link Optional} containing the error stream, or empty if not applicable
     */
    @Nonnull
    default Optional<OutputStream> stdErr() {
        return Optional.ofNullable(parserRequest().stdErr());
    }

    /**
     * Returns a list of core extensions from all sources, that were discovered and loaded. Each instance of

        MavenSimpleLogger stdout = (MavenSimpleLogger) context.loggerFactory.getLogger("stdout");
        MavenSimpleLogger stderr = (MavenSimpleLogger) context.loggerFactory.getLogger("stderr");
        stdout.setLogLevel(LocationAwareLogger.INFO_INT);
        stderr.setLogLevel(LocationAwareLogger.INFO_INT);
        PrintStream psOut = new LoggingOutputStream(s -> stdout.info("[stdout] " + s)).printStream();

  val showHeaders: Boolean by option("-i", "--include").help("Include protocol headers in the output").flag()

  val showHttp2Frames: Boolean by option("--frames").help("Log HTTP/2 frames to STDERR").flag()

  val referer: String? by option("-e", "--referer").help("Referer URL")

  val verbose: Boolean by option("-v", "--verbose").help("Makes $NAME verbose during the operation").flag()