code: public com.google.api.ads.admanager.axis.v201808.AdUnitTargetWindow getTargetWindow() {
          return targetWindow;
      }
docs: Gets the targetWindow value for this SuggestedAdUnit.
  
  @return targetWindow   * The {@code target} attribute of the underlying ad tag, as defined
  in the {@link AdUnit}. This
  attribute is read-only and is populated by Google.