return time.Since(start).Seconds()
}

type gRPCError interface {
	GRPCStatus() *status.Status
}

func getErrorCode(err error) string {
	if err == nil {
		return codes.OK.String()
	}

	// handle errors wrapped with fmt.Errorf and similar
	var s gRPCError
	if errors.As(err, &s) {
		return s.GRPCStatus().Code().String()
	}

			return true
		}
		if s.Code() == codes.Unavailable && containsExpectedMessage(s.Message()) {
			return true
		}
	}
	// If this is not a gRPCStatus we should just error message.
	if strings.Contains(err.Error(), "stream terminated by RST_STREAM with error code: NO_ERROR") {
		return true
	}
	if strings.Contains(err.Error(), "received prior goaway: code: NO_ERROR") {

      match:
      - value: getoperation
        condition: request.method == 'GET'
    - output_attribute: istio_grpcResponseStatus
      match:
      - value: OK