ZMassConstraint::IConstraintFit Node1 ZMassConstraint::IConstraintFit + doMassFit() + getMassError() + getMassError() + getMassError() + addParticle() + addParticle() + addFSRParticle() Node2 asg::IAsgTool + ~IAsgTool() + print() Node2->Node1 Node3 IAlgTool Node3->Node2