Who ordered merged pi0?
In the presentation of the davinci workflow on slide 28 of https://indico.cern.ch/event/1043362/contributions/4437076/attachments/2280777/3875311/DVConfigAndFunTuple.pdf produced by https://gitlab.cern.ch/lhcb/DaVinci/-/blob/master/DaVinciExamples/python/DaVinciExamples/tupling/example-tupling-basic-run-mc.py, @graven noted that there is no reason to unpack the calo just to do J/psi->mumu. This should be taken into account by the workflow.