public com.google.cloud.visionai.v1.Cluster.Builder addClustersBuilder(int index) {
      return getClustersFieldBuilder()
          .addBuilder(index, com.google.cloud.visionai.v1.Cluster.getDefaultInstance());
    }
<pre>
The list of Cluster.
</pre>

<code>repeated .google.cloud.visionai.v1.Cluster clusters = 1;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ListClustersResponse.java