private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.vertexai.api.Citation,
            com.google.cloud.vertexai.api.Citation.Builder,
            com.google.cloud.vertexai.api.CitationOrBuilder>
        getCitationsFieldBuilder() {
      if (citationsBuilder_ == null) {
        citationsBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.vertexai.api.Citation,
                com.google.cloud.vertexai.api.Citation.Builder,
                com.google.cloud.vertexai.api.CitationOrBuilder>(
                citations_, ((bitField0_ & 0x00000001) != 0), getParentForChildren(), isClean());
        citations_ = null;
      }
      return citationsBuilder_;
    }
<pre>
Output only. List of citations.
</pre>

<code>
repeated .google.cloud.vertexai.v1.Citation citations = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/CitationMetadata.java