Function getPreviousState

getPreviousState<StateT>(): StateT
A helper utility function for use with the functional API that returns the previous state from the checkpoint from the last invocation of the current thread.

This function allows workflows to access state that was saved in previous runs using entrypoint.final.
Type Parameters
- StateT
  The type of the state that was previously saved
Returns StateT
The previous saved state from the last invocation of the current thread
Example
```
const previousState = getPreviousState<{ counter: number }>();
const newCount = (previousState?.counter ?? 0) + 1;
```
- Defined in remotes/langchain-ai/langgraphjs/v1/libs/langgraph/src/func/index.ts:459