public Builder setNeighbors(
        int index, com.google.cloud.vertexai.api.Neighbor.Builder builderForValue) {
      if (neighborsBuilder_ == null) {
        ensureNeighborsIsMutable();
        neighbors_.set(index, builderForValue.build());
        onChanged();
      } else {
        neighborsBuilder_.setMessage(index, builderForValue.build());
      }
      return this;
    }
<pre>
Output only. List of the nearest neighbors for example-based explanations.

For models deployed with the examples explanations feature enabled, the
attributions field is empty and instead the neighbors field is populated.
</pre>

<code>
repeated .google.cloud.vertexai.v1.Neighbor neighbors = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Explanation.java