code: public void setAdjustmentType(com.google.api.ads.admanager.axis.v201902.PremiumAdjustmentType adjustmentType) {
          this.adjustmentType = adjustmentType;
      }
docs: Sets the adjustmentType value for this PremiumRateValue.
  
  @param adjustmentType   * Whether the premium rate value is a percentage or absolute
  value to the
  product rate.
  
  This attribute is required.