*
     * @return A list of all the initial builds, ordered by priority (critical path first)
     */
    public List<MavenProject> getRootSchedulableBuilds() {
        Set<MavenProject> result = new LinkedHashSet<>();
        for (ProjectSegment projectBuild : projectBuilds) {
            if (projectDependencyGraph

                .map(Map.Entry::getKey)
                .collect(Collectors.toSet());

        // schedule independent projects (ordered by critical path priority)
        for (MavenProject mavenProject : analyzer.getRootSchedulableBuilds()) {
            ProjectSegment projectSegment = projectBuildList.get(mavenProject);
            logger.debug("Scheduling: {}", projectSegment.getProject());
            Callable<ProjectSegment> cb =