graph.addEdge(vx1, vx2);
    }

    static boolean hasEdge(Graph graph, String v1, String v2) {
        Vertex vx1 = graph.getVertex(v1);
        Vertex vx2 = graph.getVertex(v2);
        return vx1 != null && vx2 != null && vx1.children.contains(vx2);
    }

        assertEquals(0, project.getSourceRoots().size());
    }

    private void assertNoNulls(List<String> elements) {
        assertFalse(elements.contains(null), "Expected " + elements + " to not contain " + null);
    }

{* ../../docs_src/dependencies/tutorial008c_an_py39.py hl[15:16] *}

 * that allows for efficient discovery of injectable components at runtime.
 * <p>
 * The generated index is stored at {@code META-INF/maven/org.apache.maven.api.di.Inject} and contains
 * the fully qualified names of all classes annotated with {@code @Named}.
 *
 * @since 4.0.0
 */

                            "required": False,
                            "schema": {
                                "anyOf": [
                                    {"type": "string"},
                                    {"type": "null"},
                                ],
                                "title": "Q",
                            },
                            "name": "q",
                            "in": "query",

     */
    public abstract DirectoryProperty getStagingRoot();

    public abstract RegularFileProperty getGeneratedMetaDataFile();

    /**
     * The fully rendered documentation with all of its necessary resources.
     */
    public abstract ConfigurableFileCollection getRenderedDocumentation();

     * @return dependency for this node
     */
    @Nullable
    Dependency getDependency();

    /**
     * Gets the child nodes of this node.
     *
     * @return the child nodes of this node, never {@code null}
     */
    @Nonnull
    List<Node> getChildren();

    /**
     * @return repositories of this node
     */
    @Nonnull
    List<RemoteRepository> getRemoteRepositories();

    /**

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }

        // make sure IncludesArtifactFilter is not equal ExcludesArtifactFilter!
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }

        IncludesArtifactFilter other = (IncludesArtifactFilter) obj;

        return patterns.equals(other.patterns);
    }

                    "properties": {
                        "name": {"type": "string", "title": "Name"},
                        "description": {
                            "anyOf": [{"type": "string"}, {"type": "null"}],
                            "title": "Description",
                        },
                    },
                    "type": "object",
                    "required": ["name"],

     */
    public static String interpretTrace(boolean detailed, RequestTrace requestTrace) {
        while (requestTrace != null) {
            Object data = requestTrace.getData();
            if (data instanceof DependencyRequest request) {
                return "dependency resolution for " + request;