{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"BackendRepr::ScalarPair(first,"}]}
                    BackendRepr::ScalarPair(first, second) => {
                    BackendRepr::Scalar(_) => BackendRepr::Scalar(niche_scalar),
                        // Only the niche is guaranteed to be initialised,