*
     * @return The model building request being processed, never {@code null}.
     */
    ModelBuilderRequest request();

    /**
     * Gets the container used to collect problems that were encountered while processing the event.
     *
     * @return The container used to collect problems that were encountered, never {@code null}.
     */
    ModelProblemCollector problems();

    private int id;

    // Constructor
    ArtifactScopeEnum(int id) {
        this.id = id;
    }

    int getId() {
        return id;
    }

    /**
     * Helper method to simplify null processing
     *
     * @param scope a scope or {@code null}
     * @return the provided scope or DEFAULT_SCOPE
     */
    public static ArtifactScopeEnum checkScope(ArtifactScopeEnum scope) {

                if (edge == null) { // no edges - don't need this vertex anymore
                    if (entry.equals(v)) { // unless it's an entry point.
                        // currently processing the entry point - it should not have any entry incident edges
                        res.getEntry().getMd().setWhy("This is a graph entry point. No links.");
                    } else {

            logger.debug("Ignoring unresolvable plugin version {}", version, e);
            return false;
        } catch (Exception e) {
            // ignore for now and delay failure to higher level processing
            return true;
        }

        try {
            pluginManager.checkPrerequisites(pluginDescriptor);
        } catch (Exception e) {