# find_subgraph_pregel

> **Function** in `langgraph`

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

## Signature

```python
find_subgraph_pregel(
    candidate: Runnable,
) -> PregelProtocol | None
```

---

[View source on GitHub](https://github.com/langchain-ai/langgraph/blob/08a345637fb2bd499f69c90056a22c478a468817/libs/langgraph/langgraph/pregel/_utils.py#L45)