How can I specify a JSON schema for structured responses in Langchain-Go?

I'm using the OpenAI Go API library (openai-go) where I can specify a structured JSON response with a JSON schema via the ResponseFormat field in ChatCompletionParams, like so:

GOCopied
params := openai.ChatCompletionNewParams{
        //Model: openai.F(openai.ChatModelGPT4o),
        Model: openai.F(openai.ChatModelGPT4oMini),
        Messages: openai.F([]openai.ChatCompletionMessageParamUnion{
            openai.UserMessage(message),
        }),
        MaxTokens:   openai.Int(200),
        Temperature: openai.Float(0.7),
        ResponseFormat: openai.F[openai.ChatCompletionNewParamsResponseFormatUnion](
            openai.ResponseFormatJSONSchemaParam{
                Type:       openai.F(openai.ResponseFormatJSONSchemaTypeJSONSchema),
                JSONSchema: openai.F(schemaParam),
            },
        ),
    }

However, when using the Langchain-Go library, I'm only able to enable JSON mode with:

GOCopied
llm, err := openai.New()
if err != nil {
    return "ERROR:", err
}
completion, err := llms.GenerateFromSinglePrompt(
    ctx,
    llm,
    "Give list of cat names and return results in valid JSON format",
    llms.WithJSONMode(),
    llms.WithTemperature(0.0),
)

How do I specify or pass a JSON schema to enforce a structured JSON response when using Langchain-Go? I have tried to find an equivalent option to ResponseFormat but haven’t found one. Any guidance or workarounds are appreciated.