docs: public RetryInterceptorBuilder<T> backOffOptions(long initialInterval,
  			double multiplier, long maxInterval) {
  		Assert.isNull(this.retryOperations,
  				"cannot set the back off policy when a custom retryOperations has been set");
  		Assert.isTrue(!this.backOffPolicySet,
  				"cannot set the back off options when a back off policy has been set");
  		ExponentialBackOffPolicy policy = new ExponentialBackOffPolicy();
  		policy.setInitialInterval(initialInterval);
  		policy.setMultiplier(multiplier);
  		policy.setMaxInterval(maxInterval);
  		this.retryTemplate.setBackOffPolicy(policy);
  		this.backOffOptionsSet = true;
  		this.templateAltered = true;
  		return this;
  	}