CP::ISystematicsTool Node1 CP::ISystematicsTool + isAffectedBySystematic() + applySystematicVariation() Node2 CP::IReentrantSystematicsTool + affectingSystematics() + recommendedSystematics() Node2->Node1 Node3 asg::IAsgTool + ~IAsgTool() + print() Node3->Node2 Node4 IAlgTool Node4->Node3