throw new IOException();
        }

        @Override
        public Appendable append(@Nullable CharSequence csq, int start, int end)
            throws IOException {
          throw new IOException();
        }

        @Override
        public Appendable append(char c) throws IOException {
          throw new IOException();
        }
      };

     * throws a RuntimeException when retrieving the nth element.
     *
     * If the PeekingIterator is caching elements too aggressively,
     * it may throw the exception on the (n-1)th element (oops!).
     */

    /* Checks the case where the first element throws an exception. */

    List<Integer> list = emptyList();

    public Set<MavenProject> getActiveProjects(
            MavenExecutionRequest request,
            List<MavenProject> projects,
            List<ProjectActivation.ProjectActivationSettings> projectSelectors)
            throws MavenExecutionException {

        Set<MavenProject> resolvedOptionalProjects = new LinkedHashSet<>();
        Set<ProjectActivation.ProjectActivationSettings> unresolvedSelectors = new HashSet<>();

     * @param repositories the list of repositories to validate, may be {@code null}
     * @return the same list if validation passes, or {@code null} if input was {@code null}
     * @throws IllegalArgumentException if the list contains duplicate repositories
     * @throws IllegalArgumentException if the list contains null repository entries
     */
    default List<RemoteRepository> validate(List<RemoteRepository> repositories) {

    @Override
    public ArtifactRepositoryLayout getLayout(String layoutId) throws UnknownRepositoryLayoutException {
        return factory.getLayout(layoutId);
    }

    @Override
    public ArtifactRepository createDeploymentArtifactRepository(
            String id, String url, String layoutId, boolean uniqueVersion) throws UnknownRepositoryLayoutException {

     * @return a map of Path to Document for all discovered POM files
     * @throws IOException if there's an error reading files
     * @throws DomTripException if there's an error parsing XML
     */
    public static Map<Path, Document> discoverPoms(Path startDirectory) throws IOException, DomTripException {
        Map<Path, Document> pomMap = new HashMap<>();

        // Find and load the root POM

    private Artifact projectArtifact;

    @BeforeEach
    @Override
    public void setUp() throws Exception {
        super.setUp();

        projectArtifact = createLocalArtifact("project", "3.0");
    }

    @Override
    protected DefaultRepositorySystemSession initRepoSession() throws Exception {
        DefaultRepositorySystemSession session = super.initRepoSession();

   */

  @Override
  public void write(int c) throws IOException {
    checkNotClosed();
    target.append((char) c);
  }

  @Override
  public void write(String str) throws IOException {
    checkNotNull(str);
    checkNotClosed();
    target.append(str);
  }

  @Override
  public void write(String str, int off, int len) throws IOException {
    checkNotNull(str);
    checkNotClosed();

    class MvnDirectoryCreationTests {

        @Test
        @DisplayName("should create .mvn directory when model version is not 4.1.0")
        void shouldCreateMvnDirectoryWhenModelVersionNot410() throws Exception {
            Path projectDir = tempDir.resolve("project");
            Files.createDirectories(projectDir);

            // Create a simple POM file
            String pomXml = PomBuilder.create()

      if (finalizer != null) {
        return finalizer;
      }
    }

    throw new AssertionError();
  }

  /** Loads Finalizer.class. */
  interface FinalizerLoader {

    /**
     * Returns Finalizer.class or null if this loader shouldn't or can't load it.
     *
     * @throws SecurityException if we don't have the appropriate privileges
     */
    @Nullable Class<?> loadFinalizer();