private function _getAllowedExtensionsJsPart(__IComponent &$component)
 {
     $return_value = '';
     $allowed_extensions = $component->getAllowedExtensions();
     if (is_array($allowed_extensions) && count($allowed_extensions) > 0) {
         $return_value = $component->getId() . '.add(Validate.AllowedFileExtensions, { allowedExtensions: /\\.(' . join('|', $allowed_extensions) . ')$/i} );' . "\n";
     }
     return $return_value;
 }