operationName,
		expBackoff.lastErrorTime.Add(expBackoff.durationBeforeRetry),
		expBackoff.durationBeforeRetry,
		expBackoff.lastError)
}

// NewExponentialBackoffError returns a new instance of ExponentialBackoff error.
func NewExponentialBackoffError(
	operationName string, expBackoff ExponentialBackoff) error {
	return exponentialBackoffError{
		operationName: operationName,
		expBackoff:    expBackoff,
	}
}