code: public java.util.List<String> getTransitGatewayRouteTableIds() {
          if (transitGatewayRouteTableIds == null) {
              transitGatewayRouteTableIds = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return transitGatewayRouteTableIds;
      }
docs: <p>
  The IDs of the transit gateway route tables.
  </p>
  
  @return The IDs of the transit gateway route tables.