@java.lang.Override
  public com.google.cloud.vertexai.api.CitationMetadata getCitationMetadata() {
    return citationMetadata_ == null
        ? com.google.cloud.vertexai.api.CitationMetadata.getDefaultInstance()
        : citationMetadata_;
  }
<pre>
Output only. Source attribution of the generated content.
</pre>

<code>
.google.cloud.vertexai.v1.CitationMetadata citation_metadata = 6 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>

@return The citationMetadata.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Candidate.java