@java.lang.Override
        public Builder mergeFrom(com.google.protobuf.Message other) {
          if (other
              instanceof com.google.cloud.vertexai.api.RagRetrievalConfig.Ranking.RankService) {
            return mergeFrom(
                (com.google.cloud.vertexai.api.RagRetrievalConfig.Ranking.RankService) other);
          } else {
            super.mergeFrom(other);
            return this;
          }
        }
<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