columnar::JetDef Node1 columnar::JetDef + idName   Node3 columnar::MutableContainer Id< JetDef > + isMutable   Node1->Node3 Node2 columnar::RegularContainer Id< xAOD::Jet, xAOD::JetContainer > + isContainerId + regularObjectId + variantObjectId + regularColumnAccessorArray + isMutable + perEventRange + perEventId   Node2->Node1