SG::MetaHandleKey< T > Node1 SG::MetaHandleKey< T > - m_store - m_cont - m_dbKey - m_isInit + MetaHandleKey() + initialize() + dbKey() + setDbKey() # isInit() # ATLAS_NOT_CONST_THREAD_SAFE() # getStore() Node4 SG::ReadMetaHandleKey< T > + ReadMetaHandleKey() + ReadMetaHandleKey() + operator=() Node1->Node4 Node2 SG::VarHandleKey - m_storeHandle - m_sgKey - m_hashedKey - m_isEventStore - m_owningHandle + VarHandleKey() + operator=() + assign() + initialize() + initialize() + clid() + key() + empty() + storeHandle() + owningHandle() + isEventStore() + start() + hashedKey() # pythonRepr() - setOwningHandle() - setKey() - updateKey() - parseKey() - updateHandle() Node2->Node1 Node3 Gaudi::DataHandle Node3->Node2