code: public com.google.api.ads.admanager.axis.v201808.SetTopBoxInfo getSetTopBoxDisplayInfo() {
          return setTopBoxDisplayInfo;
      }
docs: Gets the setTopBoxDisplayInfo value for this LineItemSummary.
  
  @return setTopBoxDisplayInfo   * Additional information for set-top box enabled line items.
  This attribute is optional and only
  meaningful when {@link #isSetTopBoxEnabled} is {@code
  true}.