message: Add getters to retrieve fit functions
diff: @@ -113,13 +113,25 @@ public:
  void Background(Double_t min, Double_t max, Double_t &background,Double_t &errbackground) const;
  void Significance(Double_t nOfSigma, Double_t &significance,Double_t &errsignificance) const;
  void Significance(Double_t min, Double_t max, Double_t &significance,Double_t &errsignificance) const;
  - TF1* GetMassTotFitFunc() {
  + TF1* GetMassTotFitFunc() const {
  if(fMassTotFunc) return fMassTotFunc;
  - else return 0x0;
  + else return nullptr;
  }
  - TF1* GetVnVsMassTotFitFunc() {
  + TF1* GetMassSignalFitFunc() const {
  + if(fMassSgnFunc) return fMassSgnFunc;
  + else return nullptr;
  + }
  + TF1* GetMassBkgFitFunc() const {
  + if(fMassBkgFunc) return fMassBkgFunc;
  + else return nullptr;
  + }
  + TF1* GetVnVsMassTotFitFunc() const {
  if(fVnTotFunc) return fVnTotFunc;
  - else return 0x0;
  + else return nullptr;
  + }
  + TF1* GetVnVsMassBkgFitFunc() const {
  + if(fVnBkgFunc) return fVnBkgFunc;
  + else return nullptr;
  }
  //struct for global chi2 (for simultaneus fit)
  