static Int_t ExtrapolateRK4(const Double_t T_in[], const Double_t C_in[], Double_t T_out[], Double_t C_out[], Double_t z_out, Double_t qp0, FairField *MF)
static Int_t ExtrapolateALight(const Double_t T_in[], const Double_t C_in[], Double_t T_out[], Double_t C_out[], Double_t z_out, Double_t qp0, FairField *MF)