* prior notice.
 *
 * @since 3.0
 */
public interface PluginDescriptorCache {

    /**
     * A cache key.
     */
    interface Key {
        // marker interface for cache keys
    }

    @FunctionalInterface
    interface PluginDescriptorSupplier {
        PluginDescriptor load()

                InternalSession.from(nonNull(request, "request").getSession());
        Predicate<PathType> filter = request.getPathTypeFilter();
        PathModularizationCache cache = new PathModularizationCache(); // TODO: should be project-wide cache.
        DependencyCollectorResult collectorResult =
                session.getService(DependencyCollector.class).collect(request);

        PluginVersionResult result = resolveFromProject(request);

        if (result == null) {
            ConcurrentMap<Key, PluginVersionResult> cache = getCache(request);
            Key key = getKey(request);
            result = cache.get(key);

            if (result == null) {
                result = resolveFromRepository(request);

                logger.debug(