public void setTrackingNamespaceVersion(Long trackingNamespaceVersion) {
        this.trackingNamespaceVersion = trackingNamespaceVersion;
    }
<p>
The version of the public namespace that the latest version is tracking.
</p>

@param trackingNamespaceVersion
       The version of the public namespace that the latest version is tracking.
aws-java-sdk-iotthingsgraph/src/main/java/com/amazonaws/services/iotthingsgraph/model/DescribeNamespaceResult.java