try (FileSystem fs = Jimfs.newFileSystem(Configuration.unix())) {
      Path root = fs.getRootDirectories().iterator().next();
      assertThat(root.getParent()).isNull();
      assertThat(root.toRealPath().getParent()).isNull();
      MoreFiles.createParentDirectories(root); // test that there's no exception
    }
  }

            prefix = prefix.replace(':', '_');
        }
        File root = root(project);
        if (eclipseProject.getName().startsWith(prefix)) {
            licenseHeaderFile = new File(root, "build-tools-internal/src/main/resources/license-headers/elastic-license-2.0-header.txt");
        } else {
            licenseHeaderFile = new File(root, "build-tools-internal/src/main/resources/license-headers/sspl+elastic-license-header.txt");

                            "Failed to read documentation for expression root: " + root, e);
                } catch (XmlPullParserException e) {
                    throw new ExpressionDocumentationException(
                            "Failed to parse documentation for expression root: " + root, e);
                }
            }
        }

        return expressionDocumentation;
    }

        this.treeRoot = root;
    }
    // ----------------------------------------------------------------------------
    public MetadataTreeNode getTree() {
        return treeRoot;
    }
    // ----------------------------------------------------------------------------
    public void setTree(MetadataTreeNode root) {
        this.treeRoot = root;
    }

        @Test
        void rootUrlIsRoot() throws Exception {
            DummySmbResourceLocator root = new DummySmbResourceLocator("smb://server/");
            // last component includes trailing slash per specification
            assertEquals("server/", root.getName());
            assertEquals("smb://", root.getParent());
            assertTrue(root.isRoot());
        }

        @Test

            UpgradeContext context, Document pomDocument) {
        Element root = pomDocument.root();

        // Extract direct values
        String groupId = root.childTextTrimmed(MavenPomElements.Elements.GROUP_ID);
        String artifactId = root.childTextTrimmed(MavenPomElements.Elements.ARTIFACT_ID);
        String version = root.childTextTrimmed(MavenPomElements.Elements.VERSION);

    @Override
    public DependencyNode transformGraph(DependencyNode root, DependencyGraphTransformationContext context) {
        ArtifactTypeRegistry registry = context.getSession().getArtifactTypeRegistry();
        if (logger.isDebugEnabled()) {
            StringBuilder sb = new StringBuilder();
            root.accept(new DependencyGraphDumper(
                    l -> sb.append(l).append("\n"),

            }
        }
    }

    /**
     * Returns a {@link File} representing the directory corresponding to the root package.
     *
     * @param rootDir the root directory
     * @param rootPackage the root package
     * @return a {@link File} representing the directory corresponding to the package
     */

                            XmlNode root = XmlService.read(is, null);
                            String groupId = mayGetChild(root, "groupId");
                            String artifactId = mayGetChild(root, "artifactId");
                            String goalPrefix = mayGetChild(root, "goalPrefix");
                            String name = mayGetChild(root, "name");

     *
     * @return the error code
     */
    public int getErrorCode() {
        return error;
    }

    /**
     * Returns the root cause of this exception
     *
     * @return the root cause throwable
     */
    public Throwable getRootCause() {
        return rootCause;
    }

    @Override
    public String toString() {
        if (rootCause != null) {