* custom enum values that have been registered through SPI providers.
 *
 * @param <T> the specific type of extensible enum managed by this registry
 * @since 4.0.0
 */
public interface ExtensibleEnumRegistry<T extends ExtensibleEnum> extends Service {
    @Nonnull
    Optional<T> lookup(@Nonnull String id);

    @Nonnull
    default T require(@Nonnull String id) {

import java.util.List;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;

import org.apache.maven.api.Lifecycle;

public interface LifecycleRegistry extends ExtensibleEnumRegistry<Lifecycle>, Iterable<Lifecycle> {

    default Stream<Lifecycle> stream() {
        return StreamSupport.stream(spliterator(), false);
    }

    List<String> computePhases(Lifecycle lifecycle);

 * provided by Maven and custom types registered through SPI provider implementations.
 *
 * @since 4.0.0
 */
@Experimental
public interface TypeRegistry extends ExtensibleEnumRegistry<Type> {

    /**
     * Obtain the {@link Type} from the specified {@code id}.
     * If no type is known for {@code id}, the registry will
     * create a custom {@code Type} for it.
     *