AthCommonAlgorithm< BaseAlg > Node1 AthCommonAlgorithm < BaseAlg > - m_extendedExtraObjects + AthCommonAlgorithm() + ~AthCommonAlgorithm() + sysInitialize() + isClonable() + sysExecute() + extraOutputDeps() + filterPassed() + setFilterPassed() Node2 AthCommonDataStore < AthCommonMsg< BaseAlg > > - m_evtStore - m_detStore - m_vhka - m_varHandleArraysDeclared + AthCommonDataStore() + evtStore() + detStore() + sysInitialize() + sysStart() + inputHandles() + outputHandles() + declareProperty() + updateVHKA() # renounceArray() # renounce() # extraDeps_update_handler() - declareGaudiProperty() Node2->Node1 Node3 AthCommonMsg< BaseAlg >   + msg() + msgLvl() Node3->Node2 Node4 BaseAlg     Node4->Node3