public static class DefaultLanguageRegistry extends DefaultExtensibleEnumRegistry<Language, LanguageProvider>
            implements LanguageRegistry {

        @Inject
        public DefaultLanguageRegistry(List<LanguageProvider> providers) {
            super(providers, Language.NONE, Language.JAVA_FAMILY);
        }
    }

    static class DefaultExtensibleEnumRegistry<T extends ExtensibleEnum, P extends ExtensibleEnumProvider<T>>

    public static class DefaultLanguageRegistry extends DefaultExtensibleEnumRegistry<Language, LanguageProvider>
            implements LanguageRegistry {

        @Inject
        public DefaultLanguageRegistry(List<LanguageProvider> providers) {
            super(providers, Language.NONE, Language.JAVA_FAMILY);
        }
    }

    public abstract static class DefaultExtensibleEnumRegistry<

import org.slf4j.LoggerFactory;

/**
 * TODO: this is session scoped as SPI can contribute.
 */
@Named
@Singleton
public class DefaultPackagingRegistry
        extends ExtensibleEnumRegistries.DefaultExtensibleEnumRegistry<Packaging, PackagingProvider>
        implements PackagingRegistry {

    private static final Logger LOGGER = LoggerFactory.getLogger(DefaultPackagingRegistry.class);

    private final Lookup lookup;

/**
 * TODO: this is session scoped as SPI can contribute.
 */
@Named
@Singleton
public class DefaultLifecycleRegistry
        extends ExtensibleEnumRegistries.DefaultExtensibleEnumRegistry<Lifecycle, LifecycleProvider>
        implements LifecycleRegistry {

    public DefaultLifecycleRegistry() {
        super(Collections.emptyList());
    }

    @Inject