@Override
 protected void checkProperties() {
   if ((workflowDefinitions == null) && (undeployWorkflowNames == null)) {
     throw new PatchException(
         ERR_PROPERTY_REQUIRED, "workflowDefinitions", "undeployWorkflowNames", this);
   }
   super.checkProperties();
 }
 @Override
 protected void checkProperties() {
   super.checkProperties();
   checkPropertyNotNull(lastSupportedVersion, "lastSupportedVersion");
 }