private function askForPropertyClass(InputInterface $input, OutputInterface $output)
    {
        return $this->questionHelper->ask(
            $input,
            $output,
            $this->getQuestion(
                "\n" . 'Property class',
                null,
                [$this, 'validatePropertyClass'],
                array_merge($this->getDocumentClasses(), array_keys($this->getContainer()->get('kernel')->getBundles()))
            )
        );
    }