code: @Override
      public GetUpgradeStatusResult getUpgradeStatus(GetUpgradeStatusRequest request) {
          request = beforeClientExecution(request);
          return executeGetUpgradeStatus(request);
      }
docs: <p>
  Retrieves the latest status of the last upgrade or upgrade eligibility check that was performed on the domain.
  </p>
  
  @param getUpgradeStatusRequest
  Container for request parameters to <code> <a>GetUpgradeStatus</a> </code> operation.
  @return Result of the GetUpgradeStatus operation returned by the service.
  @throws BaseException
  An error occurred while processing the request.
  @throws ResourceNotFoundException
  An exception for accessing or deleting a resource that does not exist. Gives http status code of 400.
  @throws DisabledOperationException
  An error occured because the client wanted to access a not supported operation. Gives http status code of
  409.
  @throws ValidationException
  An exception for missing / invalid input fields. Gives http status code of 400.
  @throws InternalException
  The request processing has failed because of an unknown error, exception or failure (the failure is
  internal to the service) . Gives http status code of 500.
  @sample AWSElasticsearch.GetUpgradeStatus