@java.lang.Override
        public Builder clone() {
          return super.clone();
        }
<pre>
Config for Rank Service.
</pre>

Protobuf type {@code google.cloud.vertexai.v1.RagRetrievalConfig.Ranking.RankService}
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/RagRetrievalConfig.java