public com.google.protobuf.ByteString getWorkloadClusterBytes() {
      java.lang.Object ref = workloadCluster_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        workloadCluster_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Optional. Immutable. The WorkloadCluster on which to create the Deployment.
This field should only be passed when the deployment_level of the source
blueprint specifies deployments on workload clusters e.g.
WORKLOAD_CLUSTER_DEPLOYMENT.
</pre>

<code>
string workload_cluster = 13 [(.google.api.field_behavior) = IMMUTABLE, (.google.api.field_behavior) = OPTIONAL];
</code>

@return The bytes for workloadCluster.
java-telcoautomation/proto-google-cloud-telcoautomation-v1alpha1/src/main/java/com/google/cloud/telcoautomation/v1alpha1/Deployment.java