private function _getAlertCategories()
 {
     $alert = '';
     $cat_with_problem = EbayCategoryConfiguration::getMultiVarToNonMultiSku($this->ebay_profile, $this->context);
     $var = implode(', ', $cat_with_problem);
     if (count($cat_with_problem) > 0) {
         if (count($cat_with_problem) == 1) {
             $alert = $this->ebay->l('You have chosen eBay category : ') . ' "' . $var . '" ' . $this->ebay->l(' which does not support multivariation products. Each variation of a product will generate a new product in eBay');
         } else {
             $alert = $this->ebay->l('You have chosen eBay categories : ') . ' "' . $var . '" ' . $this->ebay->l(' which do not support multivariation products. Each variation of a product will generate a new product in eBay');
         }
     }
     return $alert;
 }