code: public void setRateType(com.google.api.ads.admanager.axis.v201902.RateType rateType) {
          this.rateType = rateType;
      }
docs: Sets the rateType value for this PremiumRateValue.
  
  @param rateType   * The rate type this premium rate value would be applied to.
  
  This attribute is required.