public void setNotificationTopicArn(String notificationTopicArn) {
        this.notificationTopicArn = notificationTopicArn;
    }
<p>
The Amazon Resource Name (ARN) of the Amazon SNS topic to which notifications are sent.
</p>
<note>
<p>
The Amazon SNS topic owner must be same as the cluster owner.
</p>
</note>

@param notificationTopicArn
       The Amazon Resource Name (ARN) of the Amazon SNS topic to which notifications are sent.</p> <note>
       <p>
       The Amazon SNS topic owner must be same as the cluster owner.
       </p>
aws-java-sdk-elasticache/src/main/java/com/amazonaws/services/elasticache/model/ModifyCacheClusterRequest.java