code: public static List<CommerceDiscount> filterFindByG_C(long groupId,
  		String couponCode) {
  		return getPersistence().filterFindByG_C(groupId, couponCode);
  	}
docs: Returns all the commerce discounts that the user has permission to view where groupId = &#63; and couponCode = &#63;.
  
  @param groupId the group ID
  @param couponCode the coupon code
  @return the matching commerce discounts that the user has permission to view