public String getArn() {
        return this.arn;
    }
<p>
The Amazon Resource Name (ARN) that Cloud Map assigns to the namespace when you create it.
</p>

@return The Amazon Resource Name (ARN) that Cloud Map assigns to the namespace when you create it.
aws-java-sdk-servicediscovery/src/main/java/com/amazonaws/services/servicediscovery/model/NamespaceSummary.java