docs: public void marshall(LabelCounters labelCounters, ProtocolMarshaller protocolMarshaller) {
  
          if (labelCounters == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(labelCounters.getTotalLabeled(), TOTALLABELED_BINDING);
              protocolMarshaller.marshall(labelCounters.getHumanLabeled(), HUMANLABELED_BINDING);
              protocolMarshaller.marshall(labelCounters.getMachineLabeled(), MACHINELABELED_BINDING);
              protocolMarshaller.marshall(labelCounters.getFailedNonRetryableError(), FAILEDNONRETRYABLEERROR_BINDING);
              protocolMarshaller.marshall(labelCounters.getUnlabeled(), UNLABELED_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }