public String getAddonInstanceArn() {
        return this.addonInstanceArn;
    }
<p>
The Amazon Resource Name (ARN) of the Add On instance.
</p>

@return The Amazon Resource Name (ARN) of the Add On instance.
aws-java-sdk-mailmanager/src/main/java/com/amazonaws/services/mailmanager/model/GetAddonInstanceResult.java