+ cause.getMessage(),
                cause);
        // Convert to old type
        CoreExtension oldExtension = new CoreExtension();
        oldExtension.setGroupId(extension.getGroupId());
        oldExtension.setArtifactId(extension.getArtifactId());
        oldExtension.setVersion(extension.getVersion());
        if (extension.getClassLoadingStrategy() != null) {

            org.apache.maven.artifact.Artifact source,
            Supplier<ModelSource> sourcePathProvider,
            String classifier,
            String extension) {
        super(
                source.getGroupId(),
                source.getArtifactId(),
                source.getVersionRange(),
                source.getScope(),
                extension,
                classifier,

    }

    @Override
    public String getBaseVersion() {
        return artifact.getBaseVersion();
    }

    @Override
    public Object getKey() {
        return "project " + artifact.getGroupId() + ":" + artifact.getArtifactId();
    }

    @Override
    public void merge(ArtifactMetadata metadata) {
        ProjectArtifactMetadata m = (ProjectArtifactMetadata) metadata;

        @Override
        public ModelData intoCache(ModelData data) {
            Model model = (data.getModel() != null) ? data.getModel().clone() : null;
            return new ModelData(data.getSource(), model, data.getGroupId(), data.getArtifactId(), data.getVersion());
        }

        @Override
        public ModelData fromCache(ModelData data) {
            return intoCache(data);
        }
    };

    /**

            String message = (++counter) + ") " + artifact.getId();

            buffer.append(constructMissingArtifactMessage(
                    message,
                    "  ",
                    artifact.getGroupId(),
                    artifact.getArtifactId(),
                    artifact.getVersion(),
                    artifact.getType(),
                    artifact.getClassifier(),

    }

    @Nonnull
    default ArtifactCoordinates create(@Nonnull Session session, Artifact artifact) {
        return create(ArtifactCoordinatesFactoryRequest.build(
                session,
                artifact.getGroupId(),
                artifact.getArtifactId(),
                artifact.getVersion().toString(),
                artifact.getClassifier(),
                artifact.getExtension(),
                null));
    }

            init();
            MavenProject project = event.getProject();

            logger.info("");

            // -------< groupId:artifactId >-------
            String projectKey = project.getGroupId() + ':' + project.getArtifactId();

            final String preHeader = "--< ";
            final String postHeader = " >--";

                .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()

                .version("1.0.0");
        ExtendedPluginDescriptor descriptor = builder.build();
        assertEquals("additional", descriptor.getAdditionalField());
        assertEquals("org.apache.maven", descriptor.getGroupId());
    }

                .filter(project -> result.getBuildSummary(project) == null
                        || result.getBuildSummary(project) instanceof BuildFailure)
                .map(project -> project.getGroupId() + ":" + project.getArtifactId())
                .collect(Collectors.toList());

        if (remainingProjects.isEmpty()) {
            LOGGER.info("No remaining projects found, resuming the build would not make sense.");