code: public void setSetTopBoxDisplayInfo(com.google.api.ads.admanager.axis.v201902.SetTopBoxInfo setTopBoxDisplayInfo) {
          this.setTopBoxDisplayInfo = setTopBoxDisplayInfo;
      }
docs: Sets the setTopBoxDisplayInfo value for this LineItemSummary.
  
  @param setTopBoxDisplayInfo   * Additional information for set-top box enabled line items.
  This attribute is optional and only
  meaningful when {@link #isSetTopBoxEnabled} is {@code
  true}.