code: public void setAdUnitSegments(com.google.api.ads.admanager.axis.v201805.AdUnitTargeting[] adUnitSegments) {
          this.adUnitSegments = adUnitSegments;
      }
docs: Sets the adUnitSegments value for this ProductSegmentation.
  
  @param adUnitSegments   * The ad unit targeting segmentation. For each ad unit segment,
  {@link AdUnitTargeting#includeDescendants} must be true.
  
  <p>This attribute is optional.