int dot = name.lastIndexOf('.');
        String ext = dot >= 1 ? name.substring(dot + 1) : "";
        ProducedArtifact artifact = session.createProducedArtifact(
                project.getGroupId(), project.getArtifactId(), project.getVersion(), ext);
        attachArtifact(project, artifact, path);
    }

    /**
     * Attaches an artifact to the project with an explicitly specified type.
     *

    }

    @Override
    protected Object getExtensionKey(Extension extension) {
        return extension.getGroupId() + ':' + extension.getArtifactId();
    }

    @Override
    protected Object getExclusionKey(Exclusion exclusion) {
        return exclusion.getGroupId() + ':' + exclusion.getArtifactId();
    }

        } catch (InvalidVersionSpecificationException e) {
            return null;
        }

        Artifact artifact = createDependencyArtifactX(
                d.getGroupId(),
                d.getArtifactId(),
                versionRange,
                d.getType(),
                d.getClassifier(),
                d.getScope(),
                d.isOptional());

        Map<String, ArtifactRepository> versionIndex = new HashMap<>();

        Metadata metadata = new DefaultMetadata(
                request.getArtifact().getGroupId(),
                request.getArtifact().getArtifactId(),
                MAVEN_METADATA_XML,
                wantedNature);

        List<MetadataRequest> metadataRequests =

    // reason it isn't ? This localization is kind-of a code smell.

    public static String getKey(MavenProject project) {
        return project.getGroupId() + ':' + project.getArtifactId() + ':' + project.getVersion();
    }

    }

    /**
     * Gets the plugin key (groupId:artifactId) for a plugin, handling default groupId.
     */
    private String getPluginKey(Plugin plugin) {
        String groupId = plugin.getGroupId();
        String artifactId = plugin.getArtifactId();

        // Default groupId for Maven plugins
        if (groupId == null && artifactId != null && artifactId.startsWith(MAVEN_PLUGIN_PREFIX)) {

            throw new MavenException(e);
        }
    }

    private static String gav(MavenProject p) {
        return p.getGroupId() + ":" + p.getArtifactId() + ":" + p.getVersion();
    }

    private static String gav(Plugin p) {
        return p.getGroupId() + ":" + p.getArtifactId() + ":" + p.getVersion();
    }

    /**

 * @see org.apache.maven.api.services.ProjectBuilder
 */
@Experimental
public interface Project {

    /**
     * {@return the project groupId}.
     */
    @Nonnull
    String getGroupId();

    /**
     * {@return the project artifactId}.
     */
    @Nonnull
    String getArtifactId();

    /**
     * {@return the project version}.
     */
    @Nonnull
    String getVersion();

        Map<String, List<InputLocation>> metaVersionLocations = new HashMap<>();
        for (CoreExtension coreExtension : coreExtensions) {
            String ga = coreExtension.getGroupId() + ":" + coreExtension.getArtifactId();
            InputLocation location = coreExtension.getLocation("");
            gasLocations.computeIfAbsent(ga, k -> new ArrayList<>()).add(location);

                String str = ownerMojo != null ? " The " + ownerMojo.getId() : "A";
                String msg = str + " mojo is already being executed "
                        + "on the project " + session.getCurrentProject().getGroupId()
                        + ":" + session.getCurrentProject().getArtifactId() + ". "
                        + "This mojo execution will be blocked "
                        + "until the mojo is done.";