Pimcore\Model\Version::enable PHP Method

    public static function enable()
    {
        self::$disabled = false;
    }

 /**
  * @return mixed
  */
 public function getDuration()
 {
     $duration = $this->getCustomSetting("duration");
     if (!$duration) {
         $duration = $this->getDurationFromBackend();
         if ($duration) {
             $this->setCustomSetting("duration", $duration);
             Model\Version::disable();
             $this->save();
             // auto save
             Model\Version::enable();
         }
     }
     return $duration;
 }