code: public java.util.List<String> getAddRouteTableIds() {
          if (addRouteTableIds == null) {
              addRouteTableIds = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return addRouteTableIds;
      }
docs: <p>
  (Gateway endpoint) One or more route tables IDs to associate with the endpoint.
  </p>
  
  @return (Gateway endpoint) One or more route tables IDs to associate with the endpoint.