public UnsubscribeFromEventRequest withTopicArn(String topicArn) {
        setTopicArn(topicArn);
        return this;
    }
<p>
The ARN of the SNS topic to which SNS notifications are sent.
</p>

@param topicArn
       The ARN of the SNS topic to which SNS notifications are sent.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-inspector/src/main/java/com/amazonaws/services/inspector/model/UnsubscribeFromEventRequest.java