}
    }

    //region implementations delegating to adaptee
    @Override
    public MetaClass getAdaptee() {
        return adaptee;
    }

    @Override
    public void setAdaptee(MetaClass metaClass) {
        adaptee = metaClass;
    }

    @Override
    public synchronized void initialize() {
        this.adaptee.initialize();
    }

    }

    @Override
    public Optional<String> getValueDescription() {
        this.ensureUsable();
        return getAdapter().getValueDescription(this);
    }

    @Override
    public Optional<String> getTypeDescription() {
        this.ensureUsable();
        ModelView<?> modelView = getAdapter().asImmutable(ModelType.untyped(), this, null);
        if (modelView != null) {
            try {

        ModelView<? extends T> modelView;
        if (isMutable()) {
            modelView = getAdapter().asMutable(type, this, ruleDescriptor);
        } else {
            modelView = getAdapter().asImmutable(type, this, ruleDescriptor);
        }
        if (modelView == null) {