docs: public void marshall(UpgradeStepItem upgradeStepItem, ProtocolMarshaller protocolMarshaller) {
  
          if (upgradeStepItem == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(upgradeStepItem.getUpgradeStep(), UPGRADESTEP_BINDING);
              protocolMarshaller.marshall(upgradeStepItem.getUpgradeStepStatus(), UPGRADESTEPSTATUS_BINDING);
              protocolMarshaller.marshall(upgradeStepItem.getIssues(), ISSUES_BINDING);
              protocolMarshaller.marshall(upgradeStepItem.getProgressPercent(), PROGRESSPERCENT_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }