# ChatCompletionMessageToolCallChunk
## Properties
**index** | **i32** | |
**id** | Option<**String**> | The ID of the tool call. | [optional]
**r#type** | Option<**String**> | The type of the tool. Currently, only `function` is supported. | [optional]
**function** | Option<[**models::ChatCompletionMessageToolCallChunkFunction**](ChatCompletionMessageToolCallChunk_function.md)> | | [optional]
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