// a) konverze na QObject
    this->supernova = new QScriptEngine(dynamic_cast<QObject*> (this));

    printf("%p->%p", this, this->supernova->parent());
    qDebug() << this << this->supernova->parent(); // NsProcess(0x82eb9b8) NsProcess(0x82eb9b8)

// b) předání
QScriptValue constructorFile(QScriptContext *context, QScriptEngine *engine)
{
    QObject *object = new API::File(engine->parent(), context);
    return engine->newQObject(object, QScriptEngine::ScriptOwnership);
}

// c) konverze na NsProcess
File::File(QObject *engine, QScriptContext *args) : QObject()
{
    this->ps = dynamic_cast<NsProcess*> (engine->parent());
    printf("%p->%p", engine->parent(), this->ps);
    qDebug() << engine->parent() << this->ps; // QObject(0x0)  QObject(0x0)
}

// crash
QString File::doSomething()
{
    this->ps->IO->writeLine("The method File::doSomething() has been called.");
    return "I'm doing something cooler than you are!";
}