code: public static com.liferay.commerce.discount.model.CommerceDiscountRel updateCommerceDiscountRel(
  		com.liferay.commerce.discount.model.CommerceDiscountRel commerceDiscountRel) {
  		return getService().updateCommerceDiscountRel(commerceDiscountRel);
  	}
docs: Updates the commerce discount rel in the database or adds it if it does not yet exist. Also notifies the appropriate model listeners.
  
  @param commerceDiscountRel the commerce discount rel
  @return the commerce discount rel that was updated