class ClassTypeWrapper implements TypeWrapper {
    private final WeakReference<Class<?>> reference;
    private final int hashCode;

    public ClassTypeWrapper(Class<?> clazz) {
        Class<?> effectiveClass = effectiveClassOf(clazz);
        this.reference = new WeakReference<Class<?>>(effectiveClass);
        this.hashCode = effectiveClass.hashCode();
    }

    public Class<?> unwrap() {
        return reference.get();
    }