src/main/java/org/jboss/util/collection/SoftSet.java
private void processQueue()
   {
      ComparableSoftReference cr;
      while( (cr = (ComparableSoftReference) gcqueue.poll()) != null )
      {
         map.remove(cr.getKey());
      }
   }
private void processQueue()
   {
      ComparableSoftReference cr;
      while( (cr = (ComparableSoftReference) gcqueue.poll()) != null )
      {
         map.remove(cr.getKey());
      }
   }
Iterate through the gcqueue for for any cleared reference, remove
the associated value from the underlying set.