public abstract class AbstractPolymorphicDomainObjectContainer<T>
        extends AbstractNamedDomainObjectContainer<T> implements PolymorphicDomainObjectContainerInternal<T> {

    private final ContainerElementsDynamicObject elementsDynamicObject = new ContainerElementsDynamicObject();

    protected AbstractPolymorphicDomainObjectContainer(Class<T> type, Instantiator instantiator, Namer<? super T> namer, CollectionCallbackActionDecorator callbackDecorator) {