{"ast_node_type":"variable","tokens":[{"end":41,"kind":"keyword","start":0,"text":"let"}]}
                let ct = match c.kind() {
            fn fold_const(&mut self, c: Const<'tcx>) -> Const<'tcx> {
                    ty::ConstKind::Unevaluated(uv) => match self.tcx.thir_abstract_const(uv.def) {