miniproto.session.storage.SessionStorage.mutate

miniproto.session.storage.SessionStorage.mutate

mutate(transform: Callable[[Mapping[str, Any] | None], SessionPayload | None]) -> Mapping[str, Any] | None

Atomically apply a synchronous transform to an isolated current snapshot.

Parameters:

• transform (Callable[[Mapping[str, Any] | None], SessionPayload | None]) – Synchronous callback receiving detached stored data and returning replacement data or None.