{"ast_node_type":"variable","tokens":[{"end":55,"kind":"keyword","start":0,"text":"let"}]}
                let hint_ty = match *binder_ty.kind() {
                let binder_ty = self.structurally_resolve_type(inner_expr.span, binder_ty);
                    ty::UnsafeBinder(binder) => self.instantiate_binder_with_fresh_vars(