/**
  * displayConf
  *
  * @return void
  */
 public function displayConf()
 {
     if (!$this->standalone) {
         if (version_compare(_PS_VERSION_, '1.4.5.0', '<') and false) {
             $this->_errors[] = Tools::displayError('This class depends of several files modified in 1.4.5.0 version and should not be used in an older version');
         }
     }
     parent::displayConf();
 }