1 from SimTracker.TrackHistory.trackingParticleBHadronRefSelectorDefault_cfi
import trackingParticleBHadronRefSelectorDefault
as _trackingParticleBHadronRefSelectorDefault
2 trackingParticleBHadronRefSelector = _trackingParticleBHadronRefSelectorDefault.clone()
4 from Configuration.ProcessModifiers.premix_stage2_cff
import premix_stage2
5 premix_stage2.toModify(trackingParticleBHadronRefSelector, src =
"mixData:MergedTrackTruth")