src/main/java/org/jboss/util/collection/WeakSet.java
public boolean add(final Object obj) {
      maintain();

      return set.add(WeakObject.create(obj, queue));
   }
public boolean add(final Object obj) {
      maintain();

      return set.add(WeakObject.create(obj, queue));
   }
Add an element to the set.

@param obj  Element to add to the set.
@return     True if the element was added.