GsfMaterial::EnergyLoss Node1 GsfMaterial::EnergyLoss + numElements Node2 std::array< GsfMaterial ::EnergyLoss::element, GSFConstants::maxNumberofMatComponents > Node2->Node1 +elements Node3 GsfMaterial::EnergyLoss ::element + weight + deltaP + deltaQOvePCov Node3->Node2 +elements