{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"mir::AggregateKind::Adt(_,"}]}
                        mir::AggregateKind::Adt(_, variant_index, _, _, active_field_index) => {
                    let (variant_index, variant_dest, active_field_index) = match **kind {
                            let variant_dest = lval.downcast_variant(fx, variant_index);