System.out.println("[ Looking for " + groupId + ":" + artifactId + " ]");
        for (Artifact a : project.getArtifacts()) {
            System.out.println(a.toString());
            if (artifactId.equals(a.getArtifactId()) && a.getGroupId().equals(groupId)) {
                System.out.println("RETURN");
                return a;
            }
        }
        System.out.println("Return null");
        return null;
    }

        for (CoreExtensions coreExtensions : configuredCoreExtensions) {
            for (CoreExtension coreExtension : coreExtensions.coreExtensions()) {
                String key = coreExtension.getGroupId() + ":" + coreExtension.getArtifactId();
                CoreExtension conflict = selectedExtensions.putIfAbsent(key, coreExtension);
                if (conflict != null && !Objects.equals(coreExtension.getVersion(), conflict.getVersion())) {

        for (ProjectSegment projectBuild : items) {
            MavenProject project = projectBuild.getProject();
            String key = ArtifactUtils.key(project.getGroupId(), project.getArtifactId(), project.getVersion());
            projectKeys.add(key);
        }
        return projectKeys;
    }

    public boolean isEmpty() {
        return items.isEmpty();
    }

    /**

    }

    private void debugMojoExecution(MojoExecution mojoExecution) {
        String mojoExecId =
                mojoExecution.getGroupId() + ':' + mojoExecution.getArtifactId() + ':' + mojoExecution.getVersion()
                        + ':' + mojoExecution.getGoal() + " (" + mojoExecution.getExecutionId() + ')';

    }

    /**
     * Gets the artifact id of the unresolvable model.
     *
     * @return The artifact id of the unresolvable model, can be empty but never {@code null}.
     */
    public String getArtifactId() {
        return artifactId;
    }

    /**
     * Gets the version of the unresolvable model.
     *
     * @return The version of the unresolvable model, can be empty but never {@code null}.
     */

        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.
     *

        return 1L + maxDownstreamWeight;
    }

    private String getProjectId(MavenProject project) {
        return project.getGroupId() + ":" + project.getArtifactId() + ":" + project.getVersion();
    }

    private Dependency toDependency(MavenProject mavenProject) {
        Dependency dependency = new Dependency();
        dependency.setGroupId(mavenProject.getGroupId());
        dependency.setArtifactId(mavenProject.getArtifactId());
        dependency.setVersion(mavenProject.getVersion());
        return dependency;
    }

    private MavenProject createSkippedMavenProject(String artifactId) {

        }

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

        String artifactId = model.getArtifactId();

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

        return trackingFileManager.read(touchfile);
    }

    File getTouchfile(Artifact artifact) {
        StringBuilder sb = new StringBuilder(128);
        sb.append(artifact.getArtifactId());
        sb.append('-').append(artifact.getBaseVersion());
        if (artifact.getClassifier() != null) {
            sb.append('-').append(artifact.getClassifier());
        }