2 packedGenParticles = cms.EDProducer(
"PATPackedGenParticleProducer",
3 inputCollection = cms.InputTag(
"genParticles"),
4 map = cms.InputTag(
"genParticles"),
5 inputOriginal = cms.InputTag(
"genParticles"),
6 inputVertices = cms.InputTag(
"offlineSlimmedPrimaryVertices"),