public function __construct(SimpleXMLElement $xml = null)
 {
     parent::__construct($xml);
     if (is_null($xml)) {
         return;
     }
     if (count($xml->thumbParamsIdEqual)) {
         $this->thumbParamsIdEqual = (int) $xml->thumbParamsIdEqual;
     }
     $this->thumbParamsVersionEqual = (string) $xml->thumbParamsVersionEqual;
     $this->thumbAssetIdEqual = (string) $xml->thumbAssetIdEqual;
     $this->thumbAssetVersionEqual = (string) $xml->thumbAssetVersionEqual;
 }