Type guard for session/update timeline events.
session/update
After narrowing, event.data is a SessionNotification containing { sessionId, update } where update is the SessionUpdate.
event.data
SessionNotification
{ sessionId, update }
update
SessionUpdate
The timeline event to test.
true if event is an ACPSessionUpdateTimelineEvent.
true
event
Type guard for
session/updatetimeline events.After narrowing,
event.datais aSessionNotificationcontaining{ sessionId, update }whereupdateis theSessionUpdate.