public String getCurrentVersion() {
        return this.currentVersion;
    }
<p>
The version of the MSK cluster to update. Cluster versions aren't simple numbers. You can describe an MSK cluster
to find its version. When this update operation is successful, it generates a new cluster version.
</p>

@return <p>
        The version of the MSK cluster to update. Cluster versions aren't simple numbers. You can describe an MSK
        cluster to find its version. When this update operation is successful, it generates a new cluster
        version.
        </p>
aws-java-sdk-kafka/src/main/java/com/amazonaws/services/kafka/model/UpdateConnectivityRequest.java