miniproto.session.storage.InMemorySessionStorage.mutate

miniproto.session.storage.InMemorySessionStorage.mutate

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

Run a synchronous transform atomically against an isolated snapshot.

Awaitable transforms are rejected so locks are never held across an await.

Parameters:

• transform (Callable[[Mapping[str, Any] | None], SessionPayload | None]) – Synchronous callback receiving a detached current snapshot.