columnar::ContainerId::muon Node1 columnar::ContainerId ::muon Node2 columnar::ContainerId ::regularCIBase< xAOD ::Muon, xAOD::MuonContainer > + isContainerId + regularObjectId + regularColumnAccessorArray + isMutable + perEventRange + perEventId Node2->Node1 Node3 std::string_view Node3->Node1 +idName Node4 std::basic_string_view < char > Node4->Node3