public void setTopicArn(String topicArn) {
        this.topicArn = topicArn;
    }
The Amazon Resource Name (ARN) of the Amazon SNS topic that you want to publish events to.

@param topicArn
       The Amazon Resource Name (ARN) of the Amazon SNS topic that you want to publish events to.
aws-java-sdk-pinpointsmsvoice/src/main/java/com/amazonaws/services/pinpointsmsvoice/model/SnsDestination.java