columnar::ElectronDef Node1 columnar::ElectronDef     Node2 columnar::RegularContainer Id< xAOD::Electron, xAOD ::ElectronContainer > + isContainerId + regularObjectId + variantObjectId + regularColumnAccessorArray + isMutable + perEventRange + perEventId   Node2->Node1 Node3 std::string_view     Node3->Node1 +idName Node4 std::basic_string_view < Char >     Node4->Node3