docs: public void marshall(RedshiftInstanceDetails redshiftInstanceDetails, ProtocolMarshaller protocolMarshaller) {
  
          if (redshiftInstanceDetails == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(redshiftInstanceDetails.getFamily(), FAMILY_BINDING);
              protocolMarshaller.marshall(redshiftInstanceDetails.getNodeType(), NODETYPE_BINDING);
              protocolMarshaller.marshall(redshiftInstanceDetails.getRegion(), REGION_BINDING);
              protocolMarshaller.marshall(redshiftInstanceDetails.getCurrentGeneration(), CURRENTGENERATION_BINDING);
              protocolMarshaller.marshall(redshiftInstanceDetails.getSizeFlexEligible(), SIZEFLEXELIGIBLE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }