any way, in this method is there any way to get the list of all the subscribed items initially.
or at least the number of items that is subscribed to that user?

To create the table correctly, i need the number of subscribed items in the web client. is it possible to catch it in the onStart() method in js or in some other method. Also can you please elaborate the use of setSnapshotRequried(true) onEngineCreation. I think i may use it. can you please elaborate?