docs: public void marshall(ReservationPurchaseRecommendation reservationPurchaseRecommendation, ProtocolMarshaller protocolMarshaller) {
  
          if (reservationPurchaseRecommendation == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(reservationPurchaseRecommendation.getAccountScope(), ACCOUNTSCOPE_BINDING);
              protocolMarshaller.marshall(reservationPurchaseRecommendation.getLookbackPeriodInDays(), LOOKBACKPERIODINDAYS_BINDING);
              protocolMarshaller.marshall(reservationPurchaseRecommendation.getTermInYears(), TERMINYEARS_BINDING);
              protocolMarshaller.marshall(reservationPurchaseRecommendation.getPaymentOption(), PAYMENTOPTION_BINDING);
              protocolMarshaller.marshall(reservationPurchaseRecommendation.getServiceSpecification(), SERVICESPECIFICATION_BINDING);
              protocolMarshaller.marshall(reservationPurchaseRecommendation.getRecommendationDetails(), RECOMMENDATIONDETAILS_BINDING);
              protocolMarshaller.marshall(reservationPurchaseRecommendation.getRecommendationSummary(), RECOMMENDATIONSUMMARY_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }