private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.vertexai.api.Neighbor,
            com.google.cloud.vertexai.api.Neighbor.Builder,
            com.google.cloud.vertexai.api.NeighborOrBuilder>
        getNeighborsFieldBuilder() {
      if (neighborsBuilder_ == null) {
        neighborsBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.vertexai.api.Neighbor,
                com.google.cloud.vertexai.api.Neighbor.Builder,
                com.google.cloud.vertexai.api.NeighborOrBuilder>(
                neighbors_, ((bitField0_ & 0x00000002) != 0), getParentForChildren(), isClean());
        neighbors_ = null;
      }
      return neighborsBuilder_;
    }
<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