public XmlReaderRequestBuilder path(Path path) {
            this.path = path;
            return this;
        }

        public XmlReaderRequestBuilder rootDirectory(Path rootDirectory) {
            this.rootDirectory = rootDirectory;
            return this;
        }

        public XmlReaderRequestBuilder url(URL url) {
            this.url = url;
            return this;
        }

            // project present, but we could not determine rootDirectory: extra work needed
            if (context.invokerRequest.rootDirectory().isEmpty()) {
                Path rootDirectory = CliUtils.findMandatoryRoot(context.invokerRequest.topDirectory());
                request.setMultiModuleProjectDirectory(rootDirectory.toFile());
                request.setRootDirectory(rootDirectory);
            }
        }

        Files.writeString(mavenUserProps, "${includes} = ?${session.rootDirectory}/.mvn/maven-user.properties\n");
        Path rootDirectory = fs.getPath("C:\\myRootDirectory");
        Path topDirectory = rootDirectory.resolve("myTopDirectory");
        Path mvn = rootDirectory.resolve(".mvn");
        Files.createDirectories(mvn);
        Files.writeString(

    }

    @Test
    void specials() {
        InvokerRequest invokerRequest = subject.parseInvocation(ParserRequest.mvn(
                        Arrays.asList("-Dfoo=${session.rootDirectory}", "-X"), mock(MessageBuilderFactory.class))
                .cwd(Path.of(System.getProperty("userDir")))
                .userHome(Path.of(System.getProperty("userHome")))
                .build());

                throw new IllegalArgumentException("Specified file does not exists (" + file + ")");
            }
        }
        // maven.config; if exists
        Path mavenConfig = context.rootDirectory != null ? context.rootDirectory.resolve(".mvn/maven.config") : null;
        if (mavenConfig != null && Files.isRegularFile(mavenConfig)) {
            result.add(parseMavenConfigOptions(mavenConfig));
        }

    public static Path findRoot(Path topDirectory) {
        requireNonNull(topDirectory, "topDirectory");
        Path rootDirectory =
                ServiceLoader.load(RootLocator.class).iterator().next().findRoot(topDirectory);
        if (rootDirectory != null) {
            return getCanonicalPath(rootDirectory);
        }
        return null;
    }

    @Nonnull

        // This is used to compute {@code session.rootDirectory} but all {@code project.rootDirectory}
        // properties will be computed through the RootLocator found in the container.
        RootLocator rootLocator =
                ServiceLoader.load(RootLocator.class).iterator().next();
        cliRequest.rootDirectory = rootLocator.findRoot(topDirectory);

        //

            Map<String, String> extra = new HashMap<>();
            extra.put("session.topDirectory", topDirectory.toString());
            if (rootDirectory != null) {
                extra.put("session.rootDirectory", rootDirectory.toString());
            }
            return extra;
        }
    }

    @Override
    public InvokerRequest parseInvocation(ParserRequest parserRequest) {

    /**
     * @since 4.0.0
     * @return the rootDirectory for this project
     * @throws IllegalStateException if the rootDirectory cannot be found
     */
    public Path getRootDirectory() {
        if (rootDirectory == null) {
            throw new IllegalStateException(RootLocator.UNABLE_TO_FIND_ROOT_PROJECT_MESSAGE);
        }
        return rootDirectory;
    }

        request.setTopDirectory(context.invokerRequest.topDirectory());
        if (context.invokerRequest.rootDirectory().isPresent()) {
            request.setMultiModuleProjectDirectory(
                    context.invokerRequest.rootDirectory().get().toFile());
            request.setRootDirectory(context.invokerRequest.rootDirectory().get());
        }

        request.addPluginGroup("org.apache.maven.plugins");