LArSoft

Moved from ServiceNow ticket RITM0661275 by Dominic Barker:

I have recently implemented the use of EMShower_module.cc (found in the ShowerFinder directory in larreco) in SBND. This uses EMShowerAlg (found in the RecoAlg directory in larreco) to reconstruct Showers. Backtracker services is used in EMShowerAlg in a private function called FindParticleID, this is then used in a private function called FindTrueParticle. FindTrueParticle is no longer used in the rest of the code and so has no affect on the rest of the algorithm. Is it possible to comment out both these functions and remove the backtracker service from the algorithm, as they are no longer used? EMShower uses only reconstructed data and should not require Monte Carlo information. Commenting out the code would allow SBND to use the module in our reconstruction chain, which is found in sbndcode standard_reco_sbnd_basic.fcl, without having to implement the backtracker service. I feel that the reconstruction should not depend on Monte Carlo information and this is correct thing to do.