public Builder mergeFrom(
            com.google.cloud.vertexai.api.RagRetrievalConfig.Ranking.LlmRanker other) {
          if (other
              == com.google.cloud.vertexai.api.RagRetrievalConfig.Ranking.LlmRanker
                  .getDefaultInstance()) return this;
          if (other.hasModelName()) {
            modelName_ = other.modelName_;
            bitField0_ |= 0x00000001;
            onChanged();
          }
          this.mergeUnknownFields(other.getUnknownFields());
          onChanged();
          return this;
        }
<pre>
Config for LlmRanker.
</pre>

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