return groupId + ":" + artifactId;
    }

    public static String key(Artifact artifact) {
        return key(artifact.getGroupId(), artifact.getArtifactId(), artifact.getVersion());
    }

    public static String key(String groupId, String artifactId, String version) {
        notBlank(groupId, "groupId can neither be null, empty nor blank");

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

    public DuplicateProjectException(
            String projectId, File existingProjectFile, File conflictingProjectFile, String message) {

        assertEquals(expectedNode, resolvedNode, "Resolution node");
    }

    protected Artifact createArtifact(String id, String version) throws InvalidVersionSpecificationException {
        return createArtifact(id, version, Artifact.SCOPE_COMPILE);
    }

    protected Artifact createArtifact(String id, String version, String scope)
            throws InvalidVersionSpecificationException {

            }
        }
        return null;
    }

    private boolean isProjectContext(String context) {
        return context != null && context.startsWith("project");
    }

    private static boolean isAny(String str) {
        return "*".equals(str);
    }

    private static boolean matches(String pattern, String str) {
        if (isAny(pattern)) {
            return true;

        public int hashCode() {
            return delegate.hashCode();
        }

        @Override
        public String asString() {
            return delegate.toString();
        }

        @Override
        public String toString() {
            return asString();
        }
    }

    static class DefaultVersionRange implements VersionRange {
        private final VersionScheme versionScheme;

        }
    }

    private Collection<String> toScopes(String classpath) {
        Collection<String> scopes = Collections.emptyList();

        if (classpath != null && !classpath.isEmpty()) {
            if (Artifact.SCOPE_COMPILE.equals(classpath)) {
                scopes = Arrays.asList(Artifact.SCOPE_COMPILE, Artifact.SCOPE_SYSTEM, Artifact.SCOPE_PROVIDED);

    private String originalMessage;

    public PluginConfigurationException(PluginDescriptor pluginDescriptor, String originalMessage) {
        super(originalMessage);
        this.pluginDescriptor = pluginDescriptor;
        this.originalMessage = originalMessage;
    }

    public PluginConfigurationException(PluginDescriptor pluginDescriptor, String originalMessage, Throwable cause) {

        Set<String> projectIds = new HashSet<>();

        getDownstreamProjects(ProjectSorter.getId(project), projectIds, transitive);

        return getSortedProjects(projectIds);
    }

    private void getDownstreamProjects(String projectId, Set<String> projectIds, boolean transitive) {
        for (String id : sorter.getDependents(projectId)) {

    private final LifecycleRegistry registry;

    private Map<String, Lifecycle> customLifecycles;

    public DefaultLifecycles() {
        this.lookup = null;
        this.registry = null;
    }

    /**
     * @deprecated Use {@link #DefaultLifecycles(LifecycleRegistry,Lookup)} instead
     */
    @Deprecated
    public DefaultLifecycles(Map<String, Lifecycle> lifecycles, org.codehaus.plexus.logging.Logger logger) {

        return project;
    }

    @Nonnull
    @Override
    public String getGroupId() {
        return project.getGroupId();
    }

    @Nonnull
    @Override
    public String getArtifactId() {
        return project.getArtifactId();
    }

    @Nonnull
    @Override
    public String getVersion() {
        return project.getVersion();
    }

    @Nonnull
    @Override