docs: public void marshall(EndpointDemographic endpointDemographic, ProtocolMarshaller protocolMarshaller) {
  
          if (endpointDemographic == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(endpointDemographic.getAppVersion(), APPVERSION_BINDING);
              protocolMarshaller.marshall(endpointDemographic.getLocale(), LOCALE_BINDING);
              protocolMarshaller.marshall(endpointDemographic.getMake(), MAKE_BINDING);
              protocolMarshaller.marshall(endpointDemographic.getModel(), MODEL_BINDING);
              protocolMarshaller.marshall(endpointDemographic.getModelVersion(), MODELVERSION_BINDING);
              protocolMarshaller.marshall(endpointDemographic.getPlatform(), PLATFORM_BINDING);
              protocolMarshaller.marshall(endpointDemographic.getPlatformVersion(), PLATFORMVERSION_BINDING);
              protocolMarshaller.marshall(endpointDemographic.getTimezone(), TIMEZONE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }