code: public void setMoneyAmountOff(com.google.api.ads.adwords.axis.v201809.cm.MoneyWithCurrency moneyAmountOff) {
          this.moneyAmountOff = moneyAmountOff;
      }
docs: Sets the moneyAmountOff value for this PromotionFeedItem.
  
  @param moneyAmountOff   * Money amount off. Either percentOff or moneyAmountOff is required.
  Cannot set both moneyAmountOff and percentOff.