ItemListSvc Node1 ItemListSvc - m_streamItems - m_verboseThresh - m_mutex + ItemListSvc() + ~ItemListSvc() + initialize() + finalize() + addStreamItem() + removeStreamItem() + containsItem() + getStreamsForItem() + getItemsForStream() - ItemListSvc() - operator=() Node2 extends< AthService, IItemListSvc > Node2->Node1