# patch_checkpoint_map

> **Function** in `langgraph`

📖 [View in docs](https://reference.langchain.com/python/langgraph/_internal/_config/patch_checkpoint_map)

## Signature

```python
patch_checkpoint_map(
    config: RunnableConfig | None,
    metadata: CheckpointMetadata | None,
) -> RunnableConfig
```

---

[View source on GitHub](https://github.com/langchain-ai/langgraph/blob/1142ebf9213e3eb01b9d1e7223b9f6b30bf8da61/libs/langgraph/langgraph/_internal/_config.py#L59)