columnar::Particle2Def Node1 columnar::Particle2Def + idName   Node2 columnar::ParticleDef + idName   Node2->Node1 Node3 columnar::RegularContainer Id< xAOD::IParticle, xAOD ::IParticleContainer > + isContainerId + regularObjectId + variantObjectId + regularColumnAccessorArray + isMutable + perEventRange + perEventId   Node3->Node2