protected function _addSpecialAttributes(array &$attributes)
 {
     parent::_addSpecialAttributes($attributes);
     $attributes['quote_item_sku'] = Mage::helper('amrules')->__('Custom Options SKU');
     if (Mage::getStoreConfig('amrules/general/options_values')) {
         $attributes['quote_item_value'] = Mage::helper('amrules')->__('Custom Options Values');
     }
 }
 /**
  * Add special attributes
  *
  * @param array $attributes
  */
 protected function _addSpecialAttributes(array &$attributes)
 {
     parent::_addSpecialAttributes($attributes);
     $attributes[self::QUOTE_ITEM_SKU] = Mage::helper('salesrule')->__('SKU (Custom Option)');
 }
 protected function _addSpecialAttributes(array &$attributes)
 {
     parent::_addSpecialAttributes($attributes);
     $attributes['quote_item_sku'] = Mage::helper('salesrule')->__('Custom Options');
 }