String groupId = model.getGroupId();
        if (groupId == null && model.getParent() != null) {
            groupId = model.getParent().getGroupId();
        }
        return groupId;
    }

    private String getVersion(Model model) {
        String version = model.getVersion();
        if (version == null && model.getParent() != null) {
            version = model.getParent().getVersion();
        }

                    e);

            return null;
        }

        return artifactFactory.createPluginArtifact(plugin.getGroupId(), plugin.getArtifactId(), versionRange);
    }

    public ArtifactRepositoryPolicy buildArtifactRepositoryPolicy(RepositoryPolicy policy) {
        boolean enabled = true;

        String updatePolicy = null;

        String checksumPolicy = null;

        if (policy != null) {

     * @param element Configuration element name to unmarshal or {@code null} to unmarshal entire configuration.
     * @return This request for chaining, never {@code null}.
     */
    BeanConfigurationRequest setConfiguration(Object configuration, String element);

    /**
     * Returns configuration element name or {@code null}.
     *
     * @see #setConfiguration(Object, String)

     * used by plugins.
     *
     * @param artifacts The set of artifacts, may be {@code null}.
     */
    public void setResolvedArtifacts(Set<Artifact> artifacts) {
        this.resolvedArtifacts = (artifacts != null) ? artifacts : Collections.<Artifact>emptySet();
        this.artifacts = null;
        this.artifactMap = null;
    }

    /**

                        p.getDefaultValue() != null
                                ? Collections.singletonMap("default-value", p.getDefaultValue())
                                : null,
                        null,
                        null))
                .collect(Collectors.toList());
        return new XmlNodeImpl("configuration", null, null, children, null);
    }

        requireNonNull(event, "event cannot be null");

        if (!isLocalRepositoryArtifactOrMissing(event.getSession(), event.getArtifact())) {
            return;
        }

        RequestTrace trace = event.getTrace();

        CollectStepData collectStepTrace = null;
        ArtifactRequest artifactRequest = null;
        ArtifactDescriptorRequest artifactDescriptorRequest = null;
        Plugin plugin = null;

        if (reporting != null) {
            reporting.setOutputDirectory(alignToBaseDirectory(reporting.getOutputDirectory(), basedir));
        }
    }

    public String alignToBaseDirectory(String path, File basedir) {
        if (basedir == null) {
            return path;
        }

        if (path == null) {
            return null;
        }

        String s = stripBasedirToken(path);

        InputStream inputStream = request.getInputStream();
        if (path == null && url == null && reader == null && inputStream == null) {
            throw new IllegalArgumentException("path, url, reader or inputStream must be non null");
        }
        try {
            InputSource source = null;
            if (request.getModelId() != null || request.getLocation() != null) {
                source = new InputSource(

        InputStream inputStream = request.getInputStream();
        if (path == null && url == null && reader == null && inputStream == null) {
            throw new IllegalArgumentException("path, url, reader or inputStream must be non null");
        }
        try {
            InputSource source = null;
            if (request.getModelId() != null || request.getLocation() != null) {

        // v1-->v2
        graph.addEdge(v1, v2, new MetadataGraphEdge("1.1", true, null, null, 2, 1));
        graph.addEdge(v1, v2, new MetadataGraphEdge("1.2", true, null, null, 2, 2));

        // v1-->v3
        graph.addEdge(v1, v3, new MetadataGraphEdge("1.1", true, null, null, 2, 1));
        graph.addEdge(v1, v3, new MetadataGraphEdge("1.2", true, null, null, 4, 2));

        // v3-->v4