LVL1::IgTowerBuilder Node1 LVL1::IgTowerBuilder + BuildEMBgTowers() + BuildTransEMBgTowers() + BuildEMEgTowers() + BuildFwdEMECgTowers() + BuildFCALgTowers() + BuildAllTowers() + BuildSingleTower() + init() + execute() + reset() + interfaceID() Node3 LVL1::gTowerBuilder + gTowerBuilder() + ~gTowerBuilder() + init() + execute() + reset() - BuildEMBgTowers() - BuildTransEMBgTowers() - BuildEMEgTowers() - BuildFwdEMECgTowers() - BuildFCALgTowers() - BuildAllTowers() - BuildSingleTower() Node1->Node3 Node2 IAlgTool Node2->Node1