columnar::ContainerId::met1 Node1 columnar::ContainerId ::met1 Node2 columnar::ContainerId::met Node2->Node1 Node3 columnar::ContainerId ::regularCIBase< xAOD ::MissingET, xAOD::MissingETContainer > + isContainerId + regularObjectId + regularColumnAccessorArray + isMutable + perEventRange + perEventId Node3->Node2 Node4 std::string_view Node4->Node1 +idName Node4->Node2 +idName Node5 std::basic_string_view < char > Node5->Node4