code: public void setCustomTargetingSegment(com.google.api.ads.admanager.axis.v201902.CustomCriteria[] customTargetingSegment) {
          this.customTargetingSegment = customTargetingSegment;
      }
docs: Sets the customTargetingSegment value for this ProductSegmentation.
  
  @param customTargetingSegment   * The custom targeting segmentation.
  
  <p>This attribute is optional.