this.session = request.getSession();
            this.validationLevel = request.getValidationLevel();
            this.locationTracking = request.isLocationTracking();
            this.twoPhaseBuilding = request.isTwoPhaseBuilding();
            this.source = request.getSource();
            this.projectBuild = request.isProjectBuild();
            this.processPlugins = request.isProcessPlugins();

                super(session);
                this.requestType = nonNull(requestType, "requestType cannot be null");
                this.project = project;
                this.rootArtifact = rootArtifact;
                this.root = root;
                this.dependencies = unmodifiable(nonNull(dependencies, "dependencies cannot be null"));
                this.managedDependencies =

            this.path = path;
            return this;
        }

        public XmlWriterRequestBuilder<T> outputStream(OutputStream outputStream) {
            this.outputStream = outputStream;
            return this;
        }

        public XmlWriterRequestBuilder<T> writer(Writer writer) {
            this.writer = writer;
            return this;
        }

@Immutable
@Provider
public interface Node {

    /**
     * @return artifact for this node
     */
    @Nullable
    Artifact getArtifact();

    /**
     * @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();

     * The error's stacktrace will be output when this error level is enabled.
     *
     * @param content the message to log
     * @param error the error that caused this log
     */
    void debug(CharSequence content, Throwable error);

    /**
     * Sends an exception to the user in the <b>debug</b> error level.
     * The stack trace for this exception will be output when this error level is enabled.
     *

            return new String[0];
        }
    };

    /**
     * Returns the unique name of this path type, including the module to patch if any.
     * For example, if this type is {@link JavaPathType#MODULES}, then this method returns {@code "MODULES"}.
     * But if this type was created by {@code JavaPathType.patchModule("foo.bar")}, then this method returns
     * {@code "PATCH_MODULE:foo.bar"}.
     *

            this.session = session;
            return this;
        }

        public ProjectBuilderRequestBuilder path(Path path) {
            this.path = path;
            return this;
        }

        public ProjectBuilderRequestBuilder source(Source source) {
            this.source = source;
            return this;
        }

        this.projectId = (project != null)
                ? project.getGroupId() + ':' + project.getArtifactId() + ':' + project.getVersion()
                : "";
        this.pomFile = (project != null) ? project.getFile() : null;
        this.project = project;
        this.problems = problems != null ? problems : Collections.emptyList();
        this.dependencyResolutionResult = dependencyResolutionResult;

        this(null, null, null, message);
    }

    /**
     * @deprecated use {@link #DuplicateProjectException(String, File, File, String)}
     */
    @Deprecated
    public DuplicateProjectException(String message, Exception e) {
        super(message, e);
        this.projectId = null;
        this.existingProjectFile = null;
        this.conflictingProjectFile = null;
    }

        private final int hash;

        GavCacheKey(String groupId, String artifactId, String version, String tag) {
            this(gav(groupId, artifactId, version), tag);
        }

        GavCacheKey(String gav, String tag) {
            this.gav = gav;
            this.tag = tag;
            this.hash = Objects.hash(gav, tag);
        }

        private static String gav(String groupId, String artifactId, String version) {