Pimcore\Model\Document::getTypes PHP Method

    public static function getTypes()
    {
        return self::$types;
    }

 public function getDocumentTypesAction()
 {
     $documentTypes = Document::getTypes();
     $typeItems = [];
     foreach ($documentTypes as $documentType) {
         $typeItems[] = ["text" => $documentType];
     }
     $this->_helper->json($typeItems);
 }