public RemovePermissionRequest withTopicArn(String topicArn) {
        setTopicArn(topicArn);
        return this;
    }
<p>
The ARN of the topic whose access control policy you wish to modify.
</p>

@param topicArn
       The ARN of the topic whose access control policy you wish to modify.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-sns/src/main/java/com/amazonaws/services/sns/model/RemovePermissionRequest.java