ChatCompletionStreamResponseDelta

{
    "content": "string",
    "function_call": {
        "arguments": "string",
        "name": "string"
    },
    "tool_calls": [
        {
            "index": 0,
            "id": "string",
            "type": "function",
            "function": {
                "name": "string",
                "arguments": "string"
            }
        }
    ],
    "role": "developer",
    "refusal": "string"
}