How to get the unselected interactive object in a context

Hello,
I am using OpenCascade V7.4.0 on 32bit windows.

On the AIS_InteractiveContext class, there are routines :
InitSelected ()
MoreSelected ()
NextSelected ()

They allow to iterate the selected objects, but I don't know how to get an unselected object.
Is there the corresponding function for local contexts?

Best regards.
Keito