public com.google.cloud.workstations.v1beta.WorkstationCluster getWorkstationCluster() {
      if (workstationClusterBuilder_ == null) {
        return workstationCluster_ == null
            ? com.google.cloud.workstations.v1beta.WorkstationCluster.getDefaultInstance()
            : workstationCluster_;
      } else {
        return workstationClusterBuilder_.getMessage();
      }
    }
<pre>
Required. Workstation cluster to update.
</pre>

<code>
.google.cloud.workstations.v1beta.WorkstationCluster workstation_cluster = 1 [(.google.api.field_behavior) = REQUIRED];
</code>

@return The workstationCluster.
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/UpdateWorkstationClusterRequest.java