return active;
    }

    public void enable() {
        active = true;

        // TODO if it was null, we really need to go find them now... or is this taken care of by the ordering?
        if (children != null) {
            for (ResolutionNode node : children) {
                node.enable();
            }
        }
    }

    public void disable() {
        active = false;

    public boolean isParallel() {
        return parallel;
    }

    public void setParallel(boolean parallel) {
        this.parallel = parallel;
    }

    public RepositorySystemSession getRepositorySession() {
        return repositorySystemSession;
    }

    private Map<String, MavenProject> projectMap;

    public void setProjectMap(Map<String, MavenProject> projectMap) {
        this.projectMap = projectMap;

        this.modelPool = original.modelPool;
    }

    @Override
    public void addRepository(Repository repository) throws InvalidRepositoryException {
        addRepository(repository, false);
    }

    @Override
    public void addRepository(final Repository repository, boolean replace) throws InvalidRepositoryException {
        if (!repositoryIds.add(repository.getId())) {

                addScopes(filter.getScopes());
            }
        }
    }

    private void addScopes(Collection<String> scopes) {
        if (scopes != null) {
            for (String scope : scopes) {
                addScope(scope);
            }
        }
    }

    private void addScope(String scope) {
        this.scopes.add(scope);

        addScopeInternal(scope);
    }

    CacheRecord get(Key key) throws PluginResolutionException;

    CacheRecord put(Key key, List<Artifact> pluginArtifacts);

    CacheRecord put(Key key, PluginResolutionException e);

    void flush();

    /**
     * Registers the specified cache record for usage with the given project. Integrators can use the information

                    String field = "value";
                    void method();
                }
            """
            : """
                public class $TEST_INTERFACE_SIMPLE_NAME {
                    public String field = "value";
                    public void method() { }
                    public $TEST_INTERFACE_SIMPLE_NAME() { }
                }
            """

    /**
     * Creates a new {@code ProjectModelResolverTest} instance.
     */
    ProjectModelResolverTest() {
        super();
    }

    @Test
    void testResolveParentThrowsUnresolvableModelExceptionWhenNotFound() throws Exception {
        final Parent parent = new Parent();
        parent.setGroupId("org.apache");
        parent.setArtifactId("apache");

    @BeforeAll
    static void setup() throws Exception {
        try (InputStream is = MavenModelVersionTest.class.getResourceAsStream("/xml/pom.xml")) {
            model = new MavenStaxReader().read(is);
        }
    }

    @Test
    void testV4Model() {
        assertEquals("4.0.0", new MavenModelVersion().getModelVersion(model));
    }

    @Test
    void testV4ModelVersion() {

    /**
     * Sets the state of the "add default entities" flag.
     *
     * @param addDefaultEntities a addDefaultEntities object.
     */
    public void setAddDefaultEntities(boolean addDefaultEntities) {
        delegate.setAddLocationInformation(addDefaultEntities);
    } // -- void setAddDefaultEntities( boolean )

    protected Model read(Reader reader, boolean strict, InputSource source) throws IOException, XmlPullParserException {

class SourcesTest {
    @TempDir
    Path tempDir;

    @Test
    void testFromPath() {
        Path path = Paths.get("/tmp");
        Source source = Sources.fromPath(path);

        assertNotNull(source);
        assertInstanceOf(Sources.PathSource.class, source);
        assertEquals(path.normalize(), source.getPath());
    }

    @Test
    void testBuildSource() {
        Path path = Paths.get("/tmp");