message: Adds a method to retrieve the whole momentum vector from the base particle
diff: @@ -59,6 +59,9 @@ class AliFemtoDreamBasePart {
  return TVector3(-999,-999,-999);
  }
  ;
  + std::vector<TVector3> GetMomenta() const {
  + return fP;
  + }
  float GetP() const {
  return GetMomentum().Mag();
  }
  