class BackoffDelay {

	@Override
	public String toString() {
		if (min == max && max == delay) {
			return "{" + delay.toMillis() + "ms}";
		}
		else {
			return "{" + delay.toMillis() + "ms/" + max.toMillis() + "ms}";
		}
	}

	public  BackoffDelay(Duration fixedBackoff);
	public  BackoffDelay(Duration min, Duration max, Duration delay);

}