Function view 

pub fn view(
    journal: &[RecordBuf],
    open: &dyn Fn(Payload) -> Result<Payload>,
) -> Result<(BTreeMap<String, Payload>, Vec<PendingCall>)>

An object run’s committed state and running calls from its journal alone: the snapshot, then every recorded commit in order. No code runs. open removes the codec from a sealed payload.