public com.google.cloud.workstations.v1.WorkstationCluster.PrivateClusterConfig.Builder
        getPrivateClusterConfigBuilder() {
      bitField0_ |= 0x00002000;
      onChanged();
      return getPrivateClusterConfigFieldBuilder().getBuilder();
    }
<pre>
Optional. Configuration for private workstation cluster.
</pre>

<code>
.google.cloud.workstations.v1.WorkstationCluster.PrivateClusterConfig private_cluster_config = 12 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-workstations/proto-google-cloud-workstations-v1/src/main/java/com/google/cloud/workstations/v1/WorkstationCluster.java