Any API/Property in Box that show that this particulater file is Previewd

Ability to notify the client(End User) when a NEW file to view is available.
I.E: IF a new file has been uploaded to the box and is in a portal(UI) folder want to indicate to the client that a new document is available to view.

**Note:** We just want to indicate our end user that you have a new notification as you don't view this particular(New/Existing) file
**Exp-** In Attached Picture, there is Banking Form(A Box-Folder which has a file which havnt preview by this user)

No source file, test, or entry point is named. Start by researching the Box API and the Salesforce SDK's file and folder integration points for per-user preview or unread state. Done means the portal can reliably indicate that a user has a new file they have not viewed.

Written by the indexing model from the issue text.