code: public java.util.List<TransitGatewayRouteTablePropagation> getTransitGatewayRouteTablePropagations() {
          if (transitGatewayRouteTablePropagations == null) {
              transitGatewayRouteTablePropagations = new com.amazonaws.internal.SdkInternalList<TransitGatewayRouteTablePropagation>();
          }
          return transitGatewayRouteTablePropagations;
      }
docs: <p>
  Information about the route table propagations.
  </p>
  
  @return Information about the route table propagations.