}

    @Nullable
    default Path findRoot(Path basedir) {
        Path rootDirectory = basedir;
        while (rootDirectory != null && !isRootDirectory(rootDirectory)) {
            rootDirectory = rootDirectory.getParent();
        }
        return rootDirectory;
    }

    @Nonnull
    default String getNoRootMessage() {
        return UNABLE_TO_FIND_ROOT_PROJECT_MESSAGE;
    }

    boolean isRootDirectory(Path dir);

    public ArtifactMetadata getMd() {
        return md;
    }

    public void setMd(ArtifactMetadata md) {
        this.md = md;
    }

    public MetadataTreeNode getParent() {
        return parent;
    }

    public void setParent(MetadataTreeNode parent) {
        this.parent = parent;
    }

    public MetadataTreeNode[] getChildren() {
        return children;

        // load everything...
        MavenProject project0 = getProjectWithDependencies(pom0);
        MavenProject project1 = getProjectWithDependencies(pom1);

        assertEquals(pom0Basedir, project1.getParent().getBasedir());
        Set set = project1.getArtifacts();
        assertNotNull(set, "No artifacts");
        assertTrue(set.size() > 0, "No Artifacts");
        Iterator iter = set.iterator();

                if (logger.isDebugEnabled()) {
                    logger.debug("Delete {}", path);
                }

                Path parent = path.getParent();
                while (deleteEmptyDirectory(parent)) {
                    parent = parent.getParent();
                }
            } catch (final IOException e) {
                logger.warn("Failed to delete {}", path, e);
            }
        }

        this.delegate = delegate;
        this.filter = filter;
        this.next = advance();
    }


    /**
     * @return the parent
     */
    protected final SmbResource getParent () {
        return this.parent;
    }


    /**
     * @return
     * 
     */
    private SmbResource advance () {
        while ( this.delegate.hasNext() ) {

        MavenProject project0 = getProjectWithDependencies(pom0);
        MavenProject project1 = getProjectWithDependencies(pom1);

        assertEquals(pom0Basedir, project1.getParent().getBasedir());
        Set set = project1.getArtifacts();
        assertNotNull(set, "No artifacts");
        assertTrue(set.size() > 0, "No Artifacts");

            } else if (data instanceof Plugin plugin) {
                return "plugin request " + plugin.getId();
            }
            requestTrace = requestTrace.getParent();
        }

        return "n/a";
    }

            if (!touchfile.getParentFile().exists()
                    && !touchfile.getParentFile().mkdirs()) {
                getLogger()
                        .debug("Failed to create directory: " + touchfile.getParent()
                                + " for tracking artifact metadata resolution.");
                return;
            }

            FileChannel channel = null;
            FileLock lock = null;

        Path pom = determinePom(context);
        if (pom != null) {
            request.setPom(pom.toFile());
            if (pom.getParent() != null) {
                request.setBaseDirectory(pom.getParent().toFile());
            }

            // project present, but we could not determine rootDirectory: extra work needed
            if (context.invokerRequest.rootDirectory().isEmpty()) {

        }
    }

    private void write(Path metadataPath, Metadata metadata) throws RepositoryException {
        try {
            Files.createDirectories(metadataPath.getParent());
            try (OutputStream output = Files.newOutputStream(metadataPath)) {
                new MetadataStaxWriter().write(output, metadata.getDelegate());
            }