public static com.google.cloud.vertexai.api.RagRetrievalConfig.Ranking.LlmRanker
          parseDelimitedFrom(
              java.io.InputStream input,
              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
              throws java.io.IOException {
        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
            PARSER, input, extensionRegistry);
      }
<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>

@return The bytes for modelName.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/RagRetrievalConfig.java