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

     */
    public static int main(
            String[] args,
            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 static int main(
            String[] args,
            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 static int main(
            String[] args,
            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 static int main(
            String[] args,
            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();
    }

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

    /**
     * Returns the output stream for the Maven execution, if running in embedded mode.
     *