code: public com.google.api.ads.admanager.axis.v201805.PremiumFeature getPremiumFeature() {
          return premiumFeature;
      }
docs: Gets the premiumFeature value for this PremiumRateValue.
  
  @return premiumFeature   * The feature type of this premium rate value.
  
  <p>This attribute is required and cannot be changed
  after creation.