@Override
    public void handle(SnsMessageHandler handler) {
        handler.handle(this);
    }
@return A URL that you can use to unsubscribe the endpoint from this topic. If you visit this URL, Amazon SNS unsubscribes
the endpoint and stops sending notifications to this endpoint.
aws-java-sdk-sns/src/main/java/com/amazonaws/services/sns/message/SnsNotification.java