{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"Err(OverlappingIndices)"}]}
            Err(OverlappingIndices) => panic!("Indices {ai:?} and {bi:?} are not disjoint!"),
            Ok([a, b]) => (a, b),
            Err(IndexOutOfBounds) => {