docs: public void marshall(ValidationError validationError, ProtocolMarshaller protocolMarshaller) {
  
          if (validationError == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(validationError.getElementPath(), ELEMENTPATH_BINDING);
              protocolMarshaller.marshall(validationError.getErrorMessage(), ERRORMESSAGE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }