/**
     * When not null, all services are considered to have the implicit annotation
     * and the handler should be notified about all registrations.
     */
    @Nullable
    Class<? extends Annotation> getImplicitAnnotation();

    /**
     * Called when a service with the given annotation is registered.
     */
    void whenRegistered(Class<? extends Annotation> annotation, Registration registration);

    }

    @Override
    public List<Class<? extends Annotation>> getAnnotations() {
        return SCOPE_ANNOTATIONS;
    }

    @Override
    public Class<? extends Annotation> getImplicitAnnotation() {
        return ServiceScope.class;
    }

    @Override
    public void whenRegistered(Class<? extends Annotation> annotation, Registration registration) {
        validateScope(registration.getDeclaredType());

    }

    @Override
    public List<Class<? extends Annotation>> getAnnotations() {
        return ANNOTATIONS;
    }

    @Nullable
    @Override
    public Class<? extends Annotation> getImplicitAnnotation() {
        return null;
    }

    @Override
    public void whenRegistered(Class<? extends Annotation> annotation, Registration registration) {
        synchronized (lock) {

        private void notifyAnnotationHandler(AnnotatedServiceLifecycleHandler annotationHandler, SingletonService candidate) {
            if (annotationHandler.getImplicitAnnotation() != null) {
                annotationHandler.whenRegistered(annotationHandler.getImplicitAnnotation(), new RegistrationWrapper(candidate));
            } else {
                for (Class<? extends Annotation> annotation : annotationHandler.getAnnotations()) {