public com.google.cloud.visionai.v1.ClusterOrBuilder getClusterOrBuilder() {
      if (clusterBuilder_ != null) {
        return clusterBuilder_.getMessageOrBuilder();
      } else {
        return cluster_ == null
            ? com.google.cloud.visionai.v1.Cluster.getDefaultInstance()
            : cluster_;
      }
    }
<pre>
Required. The resource being updated
</pre>

<code>
.google.cloud.visionai.v1.Cluster cluster = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/UpdateClusterRequest.java