this.delegate = requireNonNull(delegate, "delegate cannot be null");
        this.childrenTracking = parent != null ? parent::replace : null;
    }

    public BaseObject(Object delegate, ChildrenTracking parent) {
        this.delegate = requireNonNull(delegate, "delegate cannot be null");
        this.childrenTracking = parent;
    }

    public Object getDelegate() {

    protected MavenExecutionRequest createMavenExecutionRequest(File pom) throws Exception {
        MavenExecutionRequest request = new DefaultMavenExecutionRequest()
                .setRootDirectory(pom != null ? pom.toPath().getParent() : null)
                .setPom(pom)
                .setProjectPresent(true)
                .setShowErrors(true)
                .setPluginGroups(Arrays.asList("org.apache.maven.plugins"))

                    plugin, session.getCurrentProject().getRemotePluginRepositories(), session.getRepositorySession());

            pluginManager.setupPluginRealm(pluginDescriptor, session, null, null, null);
        } catch (Exception e) {
            throw new PluginManagerException(plugin, e.getMessage(), e);
        }

        ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();

     * @return The effective repositories or {@code null} if the input was {@code null}.
     */
    List<ArtifactRepository> getEffectiveRepositories(List<ArtifactRepository> repositories);

    /**
     * Determines the mirror for the specified repository.
     *
     * @param repository The repository to determine the mirror for, must not be {@code null}.

    /**
     *
     * @param model the model, must not be {@code null}
     * @param logger the logger, must not be {@code null}
     */
    protected DefaultToolchain(ToolchainModel model, Logger logger) {
        this.model = model;
        this.logger = logger;
    }

    /**
     *
     * @param model the model, must not be {@code null}
     * @param type the type

      List<Cell<R, C, V>> cells,
      @Nullable Comparator<? super R> rowComparator,
      @Nullable Comparator<? super C> columnComparator) {
    checkNotNull(cells);
    if (rowComparator != null || columnComparator != null) {
      /*
       * This sorting logic leads to a cellSet() ordering that may not be expected and that isn't
       * documented in the Javadoc. If a row Comparator is provided, cellSet() iterates across the

            throw new XmlPullParserException(e.getMessage(), null, e);
        }
    }

    public Settings read(InputStream in, boolean strict) throws IOException, XmlPullParserException {
        try {
            return new Settings(delegate.read(in, strict, null));
        } catch (XMLStreamException e) {
            throw new XmlPullParserException(e.getMessage(), null, e);
        }
    }

     *
     * @param request The execution request to populate, must not be {@code null}.
     * @param toolchains The toolchains to copy into the execution request, may be {@code null}.
     * @return The populated execution request, never {@code null}.
     * @throws MavenExecutionRequestPopulationException If the execution request could not be populated.
     * @since 3.3.0
     */

        assertEquals("java", depArtifact.getProperty("language", null));
        assertEquals("jar", depArtifact.getProperty("type", null));
        assertEquals("true", depArtifact.getProperty("constitutesBuildPath", null));
        assertEquals("false", depArtifact.getProperty("includesDependencies", null));
        assertEquals(4, depArtifact.getProperties().size());

    assertFalse(entries.contains(Maps.<String, @Nullable Boolean>immutableEntry("c", null)));
    assertFalse(entries.contains(Maps.<@Nullable String, Boolean>immutableEntry(null, true)));
  }

  @Override
  public void testKeySetRemoveAllNullFromEmpty() {
    try {
      super.testKeySetRemoveAllNullFromEmpty();
    } catch (RuntimeException tolerated) {