# FunctionMessageChunk

> **Class** in `langchain_core`

📖 [View in docs](https://reference.langchain.com/python/langchain-core/messages/function/FunctionMessageChunk)

Function Message chunk.

## Signature

```python
FunctionMessageChunk(
    self,
    content: str | list[str | dict[Any, Any]] | None = None,
    content_blocks: list[types.ContentBlock] | None = None,
    kwargs: Any = {},
)
```

## Extends

- `FunctionMessage`
- `BaseMessageChunk`

## Properties

- `type`

---

[View source on GitHub](https://github.com/langchain-ai/langchain/blob/f40f58d50499700f98051be6bb610bee5dd11cc2/libs/core/langchain_core/messages/function.py#L34)