docs: public DescribeTransitGatewaysResult withTransitGateways(TransitGateway... transitGateways) {
          if (this.transitGateways == null) {
              setTransitGateways(new com.amazonaws.internal.SdkInternalList<TransitGateway>(transitGateways.length));
          }
          for (TransitGateway ele : transitGateways) {
              this.transitGateways.add(ele);
          }
          return this;
      }