code: @Override
  	public com.liferay.commerce.discount.model.CommerceDiscount fetchCommerceDiscountByUuidAndGroupId(
  		String uuid, long groupId) {
  		return _commerceDiscountLocalService.fetchCommerceDiscountByUuidAndGroupId(uuid,
  			groupId);
  	}
docs: Returns the commerce discount matching the UUID and group.
  
  @param uuid the commerce discount's UUID
  @param groupId the primary key of the group
  @return the matching commerce discount, or <code>null</code> if a matching commerce discount could not be found