public static com.google.protobuf.Parser<LlmRanker> parser() {
        return PARSER;
      }
<pre>
Optional. The model name used for ranking.
Format: `gemini-1.5-pro`
</pre>

<code>optional string model_name = 1 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The bytes for modelName to set.
@return This builder for chaining.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/RagRetrievalConfig.java