}

    @Override
    public List<MavenProject> getDownstreamProjects(MavenProject project, boolean transitive) {
        Objects.requireNonNull(project, "project cannot be null");

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

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

        return getSortedProjects(projectIds);
    }

    }

    @Override
    public List<MavenProject> getSortedProjects() {
        return new ArrayList<>(sortedProjects);
    }

    @Override
    public List<MavenProject> getDownstreamProjects(MavenProject project, boolean transitive) {
        Key key = new Key(project, transitive, false);
        // Do not use computeIfAbsent here, as the computation is recursive

    }

    private long calculateWeight(MavenProject project) {
        // Calculate maximum weight of downstream dependencies
        long maxDownstreamWeight = dependencyGraph.getDownstreamProjects(project, false).stream()
                .mapToLong(this::getProjectWeight)
                .max()
                .orElse(0L);

        // Weight = 1 + max downstream weight (similar to Takari Smart Builder)

        List<MavenProject> result = new ArrayList<>();
        // schedule dependent projects, if all of their requirements are met
        for (MavenProject dependentProject : projectDependencyGraph.getDownstreamProjects(finishedProject, false)) {
            final List<MavenProject> upstreamProjects =
                    projectDependencyGraph.getUpstreamProjects(dependentProject, false);