This event fires at various points in the /sync loop lifecycle.
SlidingSyncState.RequestFinished: Fires after we receive a valid response but before the
response has been processed. Perform any pre-process steps here. If there was a problem syncing,
err will be set (e.g network errors).
SlidingSyncState.Complete: Fires after the response has been processed.
RoomData
RoomData:"SlidingSync.RoomData"
This event fires when there are updates for a room. Fired as and when rooms are encountered
in the response.
Events which can be fired by the SlidingSync class. These are designed to provide different levels of information when processing sync responses.