code: public DescribeTransitGatewayRouteTablesResult withTransitGatewayRouteTables(TransitGatewayRouteTable... transitGatewayRouteTables) {
          if (this.transitGatewayRouteTables == null) {
              setTransitGatewayRouteTables(new com.amazonaws.internal.SdkInternalList<TransitGatewayRouteTable>(transitGatewayRouteTables.length));
          }
          for (TransitGatewayRouteTable ele : transitGatewayRouteTables) {
              this.transitGatewayRouteTables.add(ele);
          }
          return this;
      }
docs: <p>
  Information about the transit gateway route tables.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setTransitGatewayRouteTables(java.util.Collection)} or
  {@link #withTransitGatewayRouteTables(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param transitGatewayRouteTables
  Information about the transit gateway route tables.
  @return Returns a reference to this object so that method calls can be chained together.