columnar::Track1Def Node1 columnar::Track1Def + idName   Node2 columnar::TrackDef + idName   Node2->Node1 Node3 columnar::RegularContainer Id< xAOD::TrackParticle, xAOD::TrackParticleContainer > + isContainerId + regularObjectId + variantObjectId + regularColumnAccessorArray + isMutable + perEventRange + perEventId   Node3->Node2