code: public void setMobileApplicationSegment(com.google.api.ads.admanager.axis.v201902.MobileApplicationTargeting mobileApplicationSegment) {
          this.mobileApplicationSegment = mobileApplicationSegment;
      }
docs: Sets the mobileApplicationSegment value for this ProductSegmentation.
  
  @param mobileApplicationSegment   * The mobile application segmentation.
  
  <p>This attribute is optional.