MuonVal::MuonTesterAlg Node1 MuonVal::MuonTesterAlg   + initialize() + finalize() + execute() + cardinality() + AthHistogramAlgorithm() Node2 AthHistogramAlgorithm   + AthHistogramAlgorithm() + ~AthHistogramAlgorithm() + sysInitialize() + histSvc() Node2->Node1 Node3 AthAlgorithm   + AthAlgorithm() + execute() # isReEntrant() - execute() Node3->Node2 Node11 AthHistogramming - m_msg + AthHistogramming() + ~AthHistogramming() + histSvc() # configAthHistogramming() # bookGetPointer() # bookGetPointer() # bookGetPointer() # book() # book() # book() # hist() # hist2d() # hist3d() and 13 more... - buildBookingString() - myReplace() - hash() Node11->Node2 Node12 ServiceHandle< ITHistSvc >     Node12->Node2 -m_histSvc Node12->Node11 -m_histSvc Node53 MuonVal::MuonTesterTree - m_depCounter - m_init - m_written - m_directory - m_filled + MuonTesterTree() + ~MuonTesterTree() + tree() + tree() + operator->() + operator->() + initialized() + fill() + name() + fileStream() and 26 more... - addClient() - init() Node12->Node53 -m_hist_svc Node17 std::string     Node17->Node2 -m_histNamePostfix -m_histNamePrefix -m_histTitlePostfix -m_histTitlePrefix -m_prefix -m_rootDir Node17->Node11 -m_histNamePostfix -m_histNamePrefix -m_histTitlePostfix -m_histTitlePrefix -m_name -m_rootDir -m_streamName Node20 SG::VarHandleKey + isDecorHandleKey - m_hashedKey - m_isEventStore + VarHandleKey() + operator=() + assign() + initialize() + initialize() + clid() + key() + empty() + storeHandle() + owningHandle() + isEventStore() + start() + hashedKey() # pythonRepr() - setOwningHandle() - setKey() - updateKey() - parseKey() - updateHandle() Node17->Node20 -m_sgKey Node17->Node53 -m_path -m_stream Node19 SG::ReadHandleKey< DataVector< xAOD::Muon _v1 > > + isDecorHandleKey - m_storeHandle - m_sgKey - m_hashedKey - m_isEventStore - m_owningHandle + ReadHandleKey() + operator=() + assign() + initialize() + initialize() + clid() + key() + empty() + storeHandle() + owningHandle() + isEventStore() + start() + hashedKey() # pythonRepr() - setOwningHandle() - setKey() - updateKey() - parseKey() - updateHandle() Node19->Node1 -m_muonKey Node20->Node19 Node53->Node1 -m_tree Node76 std::shared_ptr< MuonVal ::IParticleFourMomBranch > + ptr + operator->() Node76->Node1 -m_muonBr