Common\Doctrine\ValueObject\SEOIndex::getPossibleValues PHP Метод

    public static function getPossibleValues()
    {
        return [self::NONE, self::INDEX, self::NOINDEX];
    }

 /**
  * @return array
  */
 private function getSEOIndexChoiceTypeOptions()
 {
     return ['expanded' => true, 'multiple' => false, 'choices' => array_combine(SEOIndex::getPossibleValues(), SEOIndex::getPossibleValues()), 'choice_label' => function ($SEOIndex) {
         if ($SEOIndex === SEOIndex::NONE) {
             return 'lbl.' . ucfirst($SEOIndex);
         }
         return $SEOIndex;
     }, 'data' => SEOIndex::NONE, 'choice_translation_domain' => true, 'required' => false, 'placeholder' => false, 'label_attr' => ['class' => 'radio-list']];
 }