The vendor identifier of the tablet associated with the event.
The tablet is typically a USB device. This method is valid only for mouse events with subtype
NSTabletProximityEventSubtype and for
Getting Tablet Proximity Information
var capabilityMask: Int
A mask whose set bits indicate the capabilities of the tablet device that generated this event.
var deviceID: Int
A special identifier that is used to match tablet-pointer and tablet-proximity events.
var tabletID: Int
The USB model identifier of the tablet device associated with this event.