StateTypedEvent

One event of a committed stream, typed: the stream it belongs to, as a StateEvent, with its eventIndex-th event as event, an E. A handler that takes a StateTypedEvent<S, E> is called once for each event of the stream that is an E, in their order, all with the stream's state after the whole commit; a handler that takes an E itself is its shorthand. It is a view of the stream, not a copy: two are equal when their streams are and they are of the same event.