Double_t GetD(Double_t xv, Double_t yv, Double_t b) const;
Double_t GetLinearD(Double_t xv, Double_t yv) const;
Bool_t CorrectForMeanMaterial(Double_t xOverX0, Double_t xTimesRho,
Double_t GetD(Double_t xv, Double_t yv, Double_t b) const;
Double_t GetLinearD(Double_t xv, Double_t yv) const;
Bool_t CorrectForMeanMaterial(Double_t xOverX0, Double_t xTimesRho,