code: public com.google.api.ads.adwords.axis.v201809.cm.AdGroupAdRotationMode getAdGroupAdRotationMode() {
          return adGroupAdRotationMode;
      }
docs: Gets the adGroupAdRotationMode value for this AdGroup.
  
  @return adGroupAdRotationMode   * The ad rotation mode to specify how often the ads in the ad
  group will be served relative to
  one another.