public void setSnsTopicArn(String snsTopicArn) {
        this.snsTopicArn = snsTopicArn;
    }
<p>
The Amazon resource name (ARN) of the Amazon Simple Notification Service SNS topic that's used to provide
notification of changes to the managed rule group. You can subscribe to the SNS topic to receive notifications
when the managed rule group is modified, such as for new versions and for version expiration. For more
information, see the <a href="https://docs.aws.amazon.com/sns/latest/dg/welcome.html">Amazon Simple Notification
Service Developer Guide</a>.
</p>

@param snsTopicArn
       The Amazon resource name (ARN) of the Amazon Simple Notification Service SNS topic that's used to provide
       notification of changes to the managed rule group. You can subscribe to the SNS topic to receive
       notifications when the managed rule group is modified, such as for new versions and for version
       expiration. For more information, see the <a
       href="https://docs.aws.amazon.com/sns/latest/dg/welcome.html">Amazon Simple Notification Service Developer
       Guide</a>.
aws-java-sdk-wafv2/src/main/java/com/amazonaws/services/wafv2/model/DescribeManagedRuleGroupResult.java