This is a collection that tracks removal and addition of elements.
This tracking allow the PersistenceBroker to delete elements from
the database that have been removed from the collection before a
PB.store() orperation occurs.
This will allow to use the PB api in way pretty close to ODMG persistent
collections!
author: Thomas Mahler version: $Id: RemovalAwareCollection.java,v 1.7.2.3 2005/12/21 22:28:15 tomdz Exp $