docs: public static List<CommerceDiscount> filterFindByG_C(long groupId,
  		String couponCode, int start, int end,
  		OrderByComparator<CommerceDiscount> orderByComparator) {
  		return getPersistence()
  				   .filterFindByG_C(groupId, couponCode, start, end,
  			orderByComparator);
  	}