message: try to solve Redefinition of default parameter
diff: @@ -19,7 +19,7 @@ AliGenerator* AddCustomMCGenPythia8Shoving( TString lTune = "pp-shovi
  AliGenerator* CreatePythia8Gen( TString lTune,
  Float_t e_cms,
  - Float_t fgAmplitude = 4.0
  + Float_t fgAmplitude
  ) {
  gSystem->Load("libpythia6");
  