return String.format(
                "layered(%s)", options.stream().map(Options::source).toList());
    }

    @Override
    public Optional<Boolean> showVersionAndExit() {
        return returnFirstPresentOrEmpty(Options::showVersionAndExit);
    }

    @Override
    public Optional<Boolean> showVersion() {
        return returnFirstPresentOrEmpty(Options::showVersion);
    }

    @Override

    /**
     * Indicates whether to show the version information and exit.
     *
     * @return an {@link Optional} containing the boolean flag, or empty if not set
     */
    @Nonnull
    Optional<Boolean> showVersionAndExit();

    /**
     * Indicates whether to show the version information.
     *
     * @return an {@link Optional} containing the boolean flag, or empty if not set
     */
    @Nonnull

                    mavenOptions.userProperties().get().entrySet()) {
                cmdAndArguments.add("-D" + entry.getKey() + "=" + entry.getValue());
            }
        }
        if (mavenOptions.showVersionAndExit().orElse(false)) {
            cmdAndArguments.add("--version");
        }
        if (mavenOptions.showVersion().orElse(false)) {
            cmdAndArguments.add("--show-version");
        }