MuonCalibR4::TrSqrt Node1 MuonCalibR4::TrSqrt + TrSqrt() + tFromR() + rFromT() Node2 MuonCalib::TrRelation - m_r - m_t + TrRelation() + TrRelation() + tFromR() + rFromT() - getTFromR() Node2->Node1