assertThat(root.getParent()).isNull();
      assertThat(root.toRealPath().getParent()).isNull();
      MoreFiles.createParentDirectories(root); // test that there's no exception
    }
  }

  public void testCreateParentDirectories_relativePath() throws IOException {
    Path path = FS.getPath("nonexistent.file");
    assertThat(path.getParent()).isNull();

      assertThat(root.getParent()).isNull();
      assertThat(root.toRealPath().getParent()).isNull();
      MoreFiles.createParentDirectories(root); // test that there's no exception
    }
  }

  public void testCreateParentDirectories_relativePath() throws IOException {
    Path path = FS.getPath("nonexistent.file");
    assertThat(path.getParent()).isNull();

            Files.createDirectories(basePath);
            final Path realBase = basePath.toRealPath();
            Files.createDirectories(filePath.getParent());
            final Path realParent = filePath.getParent().toRealPath();
            if (!realParent.startsWith(realBase)) {
                logger.warn("Symlink traversal detected: url={}, realParent={}, realBase={}", url, realParent, realBase);

  }

  private WeakReference<ClassLoader> useFrqInSeparateLoader() throws Exception {
    ClassLoader myLoader = getClass().getClassLoader();
    URLClassLoader sepLoader = new URLClassLoader(getClassPathUrls(), myLoader.getParent());
    // sepLoader is the loader that we will use to load the parallel FinalizableReferenceQueue (FRQ)
    // and friends, and that we will eventually expect to see garbage-collected. The assumption

  }

  private WeakReference<ClassLoader> useFrqInSeparateLoader() throws Exception {
    ClassLoader myLoader = getClass().getClassLoader();
    URLClassLoader sepLoader = new URLClassLoader(getClassPathUrls(), myLoader.getParent());
    // sepLoader is the loader that we will use to load the parallel FinalizableReferenceQueue (FRQ)
    // and friends, and that we will eventually expect to see garbage-collected. The assumption

        boolean preserveModelVersion = model.isPreserveModelVersion();

        // raw to consumer transform
        model = model.withRoot(false).withModules(null).withSubprojects(null);
        Parent parent = model.getParent();
        if (parent != null) {
            model = model.withParent(parent.withRelativePath(null));
        }
        var projectSources = project.getBuild().getDelegate().getSources();

        .containsExactlyElementsIn(locations);
  }

  public void testLocationEquals() {
    ClassLoader child = getClass().getClassLoader();
    ClassLoader parent = child.getParent();
    new EqualsTester()
        .addEqualityGroup(
            new ClassPath.LocationInfo(new File("foo.jar"), child),
            new ClassPath.LocationInfo(new File("foo.jar"), child))

        .containsExactlyElementsIn(locations);
  }

  public void testLocationEquals() {
    ClassLoader child = getClass().getClassLoader();
    ClassLoader parent = child.getParent();
    new EqualsTester()
        .addEqualityGroup(
            new ClassPath.LocationInfo(new File("foo.jar"), child),
            new ClassPath.LocationInfo(new File("foo.jar"), child))

     *         project (e.g. describes the metadata of some artifact from the repository).
     */
    public Path getProjectDirectory() {
        return (pomFile != null) ? pomFile.getParent() : null;
    }

    /**
     * @return the model id as {@code groupId:artifactId:packaging:version}
     */
    public String getId()
    {
        StringBuilder id = new StringBuilder( 64 );

 *
 * <p>If you have your own graph implementation based around a custom node type {@code MyNode},
 * which has a method {@code getParents()} that retrieves its predecessors in a graph:
 *
 * {@snippet :
 * someGraphAlgorithm(startNode, MyNode::getParents);
 * }
 *
 * <p>If you have some other mechanism for returning the predecessors of a node, or one that doesn't