MuonCalibR4::TrSqrt Node1 MuonCalibR4::TrSqrt + TrSqrt() + tFromR() + rFromT() Node2 MuonCalib::TrRelation + TrRelation() + TrRelation() + tFromR() + rFromT() - getTFromR() Node2->Node1 Node3 std::vector< double > + elements Node3->Node2 -m_t -m_r