columnar::ContainerId::track2 Node1 columnar::ContainerId ::track2 + idName Node2 columnar::ContainerId ::track + idName Node2->Node1 Node3 columnar::ContainerId ::regularCIBase< xAOD ::TrackParticle, xAOD ::TrackParticleContainer > + isContainerId + regularObjectId + regularColumnAccessorArray + isMutable + perEventRange + perEventId Node3->Node2