* abused as a cache (i.e. for storing values that can be re-calculated) to avoid memory exhaustion.
 * <p>
 * <strong>Note:</strong> Actual implementations must be thread-safe.
 *
 * @see Session#getData()
 * @since 4.0.0
 */
@Experimental
@ThreadSafe
@Provider
public interface SessionData {

    /**
     * Associates the specified session data with the given key.
     *

    public List<RemoteRepository> getRemoteRepositories() {
        return Collections.unmodifiableList(repositories);
    }

    @Nonnull
    @Override
    public SessionData getData() {
        org.eclipse.aether.SessionData data = session.getData();
        return new SessionData() {
            @Override
            public <T> void set(@Nonnull Key<T> key, @Nullable T value) {
                data.set(key, value);

            RepositorySystemSession session, ArtifactDescriptorResult artifactDescriptorResult, Model model)
            throws ArtifactDescriptorException {
        Relocations relocations = (Relocations) session.getData()
                .computeIfAbsent(getClass().getName() + ".relocations", () -> parseRelocations(session));
        if (relocations != null) {
            Artifact original = artifactDescriptorResult.getRequest().getArtifact();

        return null;
    }

    @SuppressWarnings("unchecked")
    private ConcurrentMap<Key, PluginVersionResult> getCache(PluginVersionRequest request) {
        SessionData data = request.getRepositorySession().getData();
        return (ConcurrentMap<Key, PluginVersionResult>)
                data.computeIfAbsent(CACHE_KEY, () -> new ConcurrentHashMap<>(256));
    }

    private static Key getKey(PluginVersionRequest request) {

                logger.fine(() -> "Response in " + (dfos.isInMemory() ? "Memory" : "File"));
                if (dfos.isInMemory()) {
                    contentCache = new ContentCache(dfos.getData());
                } else {
                    contentCache = new ContentCache(dfos.getFile());
                }
                response.setContentCache(contentCache);
            } catch (final Exception e) {

                    final ResultData resultData = transformer.transform(responseData);
                    final byte[] data = resultData.getData();
                    if (data != null) {
                        try {
                            @SuppressWarnings("unchecked")

            final Transformer transformer = ((DefaultResponseProcessor) responseProcessor).getTransformer();
            final ResultData resultData = transformer.transform(responseData);
            final byte[] data = resultData.getData();
            if (data != null) {
                try {
                    return (Map<String, Object>) SerializeUtil.fromBinaryToObject(data);
                } catch (final Exception e) {

                if (Features.buildConsumer(request.getUserProperties())) {
                    request.getRepositorySession()
                            .getData()
                            .set(ModelTransformerContext.KEY, transformerContextBuilder.build());
                }

                return results;
            } finally {

    }

    protected PathMappingHelper getPathMappingHelper() {
        return ComponentUtil.getPathMappingHelper();
    }

    @Override
    public Object getData(final AccessResultData<?> accessResultData) {
        final byte[] data = accessResultData.getData();
        if (data != null) {
            try {
                return SerializeUtil.fromBinaryToObject(data);
            } catch (final Exception e) {

    /**
     * @since 3.3.0
     */
    EventSpyDispatcher getEventSpyDispatcher();

    /**
     * @since 3.3.0
     */
    Map<String, Object> getData();