public Long getValidatedNamespaceVersion() {
        return this.validatedNamespaceVersion;
    }
<p>
The version of the user's namespace against which the system instance was validated.
</p>

@return The version of the user's namespace against which the system instance was validated.
aws-java-sdk-iotthingsgraph/src/main/java/com/amazonaws/services/iotthingsgraph/model/SystemInstanceDescription.java