The following UML class diagram summarizes the relationships
between
IlvManager, IlvGraphic, IlvManagerLayer,
and IlvManagerView. The manager contains a number of manager views that in
turn contain graphic objects as elements. The layer of a graphic object
can be queried and manipulated by the API on the
IlvManager.
The contents of the manager are displayed by a manager view. Multiple
manager views can be attached to the same manager. 
The classes related to IlvManager