# checkpoint_null_version

> **Function** in `langgraph`

📖 [View in docs](https://reference.langchain.com/python/langgraph/pregel/_algo/checkpoint_null_version)

Get the null version for the checkpoint, if available.

## Signature

```python
checkpoint_null_version(
    checkpoint: Checkpoint,
) -> V | None
```

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[View source on GitHub](https://github.com/langchain-ai/langgraph/blob/d27d4b2d9895a4aa83170b4aaa135878f99c7fd6/libs/langgraph/langgraph/pregel/_algo.py#L1049)