Function decodeEvent

decodeEvent(raw: unknown): KnownEvent | UnknownEvent
Classifies one received event by its type alone, before any payload is looked at.
Parameters
- raw: unknown
  One item of EventPage.events or a gateway dispatch, as received.
Returns KnownEvent | UnknownEvent
{ kind: "known", event } for a type in KNOWN_EVENT_TYPES, otherwise an UnknownEvent; never a known type for an event of another type, even when its payload would fit.
Example
```
const decoded = decodeEvent(item);
if (decoded.kind === "known" && decoded.event.type === "thread.updated") {
  show(decoded.event.payload.thread);
}
```