private void buildPartial0(
            com.google.cloud.vertexai.api.RagRetrievalConfig.Ranking.RankService result) {
          int from_bitField0_ = bitField0_;
          int to_bitField0_ = 0;
          if (((from_bitField0_ & 0x00000001) != 0)) {
            result.modelName_ = modelName_;
            to_bitField0_ |= 0x00000001;
          }
          result.bitField0_ |= to_bitField0_;
        }
<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