code: private final void _declareReleasable(AbstractItem item) throws SevereMessageStoreException
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "_declareReleasable");
  
          if (_isStorageManaged)
          {
              // 274012 - now set to null under the AIL's monitor in _declareDiscardable
              // and persistentRepresentationIsStable
              // _strongReferenceToItem = null;
              _itemCache.manage(this, item);
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "_declareReleasable");
      }
docs: inform the cache (if there is one) that the item owned by this
  link is releasable.
  
  @throws SevereMessageStoreException