List<String> nodeTrail = new ArrayList<>(trail.size() + 1);
            nodeTrail.addAll(trail);
            nodeTrail.add(artifact.getId());

            if (filter == null || filter.accept(node, Collections.emptyList())) {
                artifact.setDependencyTrail(nodeTrail);
                artifacts.add(artifact);
            }

            toArtifacts(artifacts, node.getChildren(), nodeTrail, filter);
        }
    }

        metadata.setArtifactId(artifact.getArtifactId());
        metadata.setVersion(artifact.getBaseVersion());

        return metadata;
    }

    public void bind(Artifact artifact) {
        artifacts.add(artifact);
    }

    public Object getKey() {
        return getGroupId() + ':' + getArtifactId() + ':' + getVersion();
    }

    public static Object getKey(Artifact artifact) {

                try {
                    BuilderCommon.attachToThread(project); // Not totally sure if this is needed for anything
                    session.setCurrentProject(project);
                    projectBuilds.add(new ProjectSegment(project, taskSegment, session));
                } finally {
                    session.setCurrentProject(currentProject);
                    Thread.currentThread().setContextClassLoader(tccl);

 *
 * @see DefaultRootLocator
 */
public interface RootLocator {

    String UNABLE_TO_FIND_ROOT_PROJECT_MESSAGE = "Unable to find the root directory. "
            + "Create a .mvn directory in the root directory or add the root=\"true\""
            + " attribute on the root project's model to identify it.";

    @Nonnull
    default Path findMandatoryRoot(Path basedir) {
        Path rootDirectory = findRoot(basedir);

     * determinism, the environment variable names will be normalized to upper case on platforms with case-insensitive
     * variable lookup.
     *
     * @param props The properties to add the environment variables to, may be {@code null}.
     */
    public static void addEnvVars(Properties props) {
        if (props != null) {
            if (envVars == null) {
                Properties tmp = new Properties();

            result.setVersion(version);
        } else {
            List<MetadataRequest> metadataReqs =
                    new ArrayList<>(request.getRepositories().size());

            metadataReqs.add(new MetadataRequest(metadata, null, request.getRequestContext()));

            for (RemoteRepository repository : request.getRepositories()) {
                MetadataRequest metadataRequest =

                .forEach(plugin -> plugin.getExecutions().forEach(exec -> exec.getGoals()
                        .forEach(goal -> goals.computeIfAbsent(phase.name(), n -> new ArrayList<>())
                                .add(plugin.getGroupId() + ":" + plugin.getArtifactId() + ":" + plugin.getVersion()
                                        + ":" + goal)))));
        return goals.entrySet().stream()

        if (node.getValue() != null) {
            return node.getValue();
        } else {
            List<Object> children = new ArrayList<>();
            for (XmlNode child : node.getChildren()) {
                children.add(getValue(child));
            }
            return children;
        }
    }

    @Override
    public Object getBaseValue() {
        return node;
    }

    @Override

        if (name != null && name.startsWith("!")) {
            reverseName = true;
            name = name.substring(1);
        }

        if (name == null || name.isEmpty()) {
            problems.add(
                    BuilderProblem.Severity.ERROR,
                    ModelProblem.Version.BASE,
                    "The property name is required to activate the profile " + profile.getId(),

                Path path = artifactManager.getPath(artifact).orElse(null);
                if (path != null) {
                    paths.put(artifact, path);
                } else {
                    requests.add(new ArtifactRequest(aetherArtifact, repositories, null));
                }
            }
            if (!requests.isEmpty()) {
                List<ArtifactResult> results =