public void setTopicName(String topicName) {
        this.topicName = topicName;
    }
<p>
The name of the Amazon SNS topic from which to remove the directory as a publisher.
</p>

@param topicName
       The name of the Amazon SNS topic from which to remove the directory as a publisher.
aws-java-sdk-directory/src/main/java/com/amazonaws/services/directory/model/DeregisterEventTopicRequest.java