xAODMaker::ITriggerTowerCnvTool Node1 xAODMaker::ITriggerTower CnvTool + convert() + interfaceID() Node3 xAODMaker::TriggerTowerCnvTool + TriggerTowerCnvTool() + convert() Node1->Node3 Node2 IAlgTool Node2->Node1