# NotProvided

> **Class** in `langgraph.store`

📖 [View in docs](https://reference.langchain.com/python/langgraph.store/base/NotProvided)

Sentinel singleton.

## Signature

```python
NotProvided()
```

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[View source on GitHub](https://github.com/langchain-ai/langgraph/blob/6f83cc9dc2a24c7884ae7da20c9f39f469be35d7/libs/checkpoint/langgraph/store/base/__init__.py#L37)