code: public static com.liferay.commerce.discount.model.CommerceDiscountRule addCommerceDiscountRule(
  		com.liferay.commerce.discount.model.CommerceDiscountRule commerceDiscountRule) {
  		return getService().addCommerceDiscountRule(commerceDiscountRule);
  	}
docs: Adds the commerce discount rule to the database. Also notifies the appropriate model listeners.
  
  @param commerceDiscountRule the commerce discount rule
  @return the commerce discount rule that was added