DerivationFramework::BoostedTTbarSkimmingToolAlg Node1 DerivationFramework ::BoostedTTbarSkimmingToolAlg + m_ttbarCut + BoostedTTbarSkimmingTool Alg() + ~BoostedTTbarSkimmingTool Alg() + initialize() + finalize() + eventPassesFilter() Node2 extends< AthAlgTool, ISkimmingTool >     Node2->Node1 Node3 std::atomic< unsigned int > + ptr   Node3->Node1 -m_npass -m_ntot