Function bootstrap_from_snapshot 

pub async fn bootstrap_from_snapshot<S, L>(
    loader: &L,
    service: &S,
) -> Result<Option<(i64, HashMap<String, HashMap<i32, i64>>)>, SnapshotError>
where
    S: Snapshotable,
    L: SnapshotLoader<Key = S::Key, State = S::State>,

Bootstrap a service from its latest snapshot.

Returns the snapshot ID and offsets if a snapshot was restored, or None if no snapshot exists.