private final ExtraPropertiesExtension extension;
    private final Class<?> delegateType;

    public ExtraPropertiesDynamicObjectAdapter(Class<?> delegateType, ExtraPropertiesExtension extension) {
        this.delegateType = delegateType;
        this.extension = extension;
    }

    @Override
    public String getDisplayName() {
        return delegateType.getName();
    }

    @Override

        if (delegateType != null && Modifier.isAbstract(delegateType.getConcreteClass().getModifiers())) {
            throw new InvalidManagedTypeException(String.format("Type '%s' is not a valid managed type: delegate type must be null or a non-abstract type instead of '%s'.",
                publicType.getDisplayName(), delegateType.getDisplayName()));
        }

        String constructorDescriptor;
        Type delegateType;
        if (delegateSchema == null) {
            delegateType = null;
            constructorDescriptor = Type.getMethodDescriptor(Type.VOID_TYPE, backingStateType, TYPE_CONVERTER_TYPE);
        } else {
            delegateType = Type.getType(delegateSchema.getType().getConcreteClass());

    }

    @Override
    protected void initializePrivateData(MutableModelNode modelNode) {
        ModelType<T> delegateType = Cast.uncheckedCast(implementationInfo.getDelegateType());
        T instance = Cast.uncheckedCast(implementationInfo.create(modelNode));
        modelNode.setPrivateData(delegateType, instance);
    }

            } else {
                ModelType<?> delegateType = delegateSchema.getType();
                Object delegate = state.getBackingNode().getPrivateData(delegateType);
                Constructor<? extends T> constructor = generatedClass.getConstructor(ModelElementState.class, TypeConverter.class, delegateType.getConcreteClass());
                return constructor.newInstance(state, typeConverter, delegate);

            return null;
        }
        Set<ModelType<?>> internalViews = implementationInfo.getInternalViews();
        ModelType<?> delegateType = implementationInfo.getDelegateType();
        StructBindings<S> bindings = bindingsStore.getBindings(publicSchema.getType(), internalViews, delegateType);
        return new FactoryBasedStructNodeInitializer<T, S>(bindings, implementationInfo);
    }

            ModelType<?> delegateType = implementationInfo.getDelegateType();
            for (InternalViewRegistration<?> internalViewRegistration : internalViewRegistrations) {
                validateManagedInternalView(internalViewRegistration, delegateType);
            }
        }

public interface StructBindingsStore {
    <T> StructBindings<T> getBindings(ModelType<T> publicType);

    <T> StructBindings<T> getBindings(ModelType<T> publicType, Iterable<? extends ModelType<?>> internalViewTypes, ModelType<?> delegateType);

        return generate(ModelElementState, managedType, delegateType)
    }

    def <T, M extends T, D extends T> Class<? extends T> generate(Class<? extends GeneratedViewState> backingStateType, Class<T> managedType, Class<D> delegateType) {
        def key = [backingStateType, managedType, delegateType]

    def extract(Class<?> type, Class<?> delegateType = null) {
        return extract(type, [], delegateType)
    }
    def extract(Class<?> type, List<Class<?>> viewTypes, Class<?> delegateType = null) {
        return bindingStore.getBindings(
            ModelType.of(type),
            viewTypes.collect { ModelType.of(it) },
            delegateType == null ? null : ModelType.of(delegateType)
        )
    }