docs: public void marshall(ScalingActivity scalingActivity, ProtocolMarshaller protocolMarshaller) {
  
          if (scalingActivity == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(scalingActivity.getActivityId(), ACTIVITYID_BINDING);
              protocolMarshaller.marshall(scalingActivity.getServiceNamespace(), SERVICENAMESPACE_BINDING);
              protocolMarshaller.marshall(scalingActivity.getResourceId(), RESOURCEID_BINDING);
              protocolMarshaller.marshall(scalingActivity.getScalableDimension(), SCALABLEDIMENSION_BINDING);
              protocolMarshaller.marshall(scalingActivity.getDescription(), DESCRIPTION_BINDING);
              protocolMarshaller.marshall(scalingActivity.getCause(), CAUSE_BINDING);
              protocolMarshaller.marshall(scalingActivity.getStartTime(), STARTTIME_BINDING);
              protocolMarshaller.marshall(scalingActivity.getEndTime(), ENDTIME_BINDING);
              protocolMarshaller.marshall(scalingActivity.getStatusCode(), STATUSCODE_BINDING);
              protocolMarshaller.marshall(scalingActivity.getStatusMessage(), STATUSMESSAGE_BINDING);
              protocolMarshaller.marshall(scalingActivity.getDetails(), DETAILS_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }