protected function getLocaleLabels(array $crud)
    {
        $locales      = $this->getLocales();
        $localeLabels = [];
        foreach ($locales as $locale) {
            if (array_key_exists('label_'.$locale, $crud)) {
                $localeLabels[$locale] = $crud['label_'.$locale];
            }
        }
        return $localeLabels;
    }