@java.lang.Override
    public int hashCode() {
      if (memoizedHashCode != 0) {
        return memoizedHashCode;
      }
      int hash = 41;
      hash = (19 * hash) + getDescriptor().hashCode();
      switch (rankingConfigCase_) {
        case 1:
          hash = (37 * hash) + RANK_SERVICE_FIELD_NUMBER;
          hash = (53 * hash) + getRankService().hashCode();
          break;
        case 3:
          hash = (37 * hash) + LLM_RANKER_FIELD_NUMBER;
          hash = (53 * hash) + getLlmRanker().hashCode();
          break;
        case 0:
        default:
      }
      hash = (29 * hash) + getUnknownFields().hashCode();
      memoizedHashCode = hash;
      return hash;
    }
<pre>
Optional. Config for LlmRanker.
</pre>

<code>
.google.cloud.vertexai.v1.RagRetrievalConfig.Ranking.LlmRanker llm_ranker = 3 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/RagRetrievalConfig.java