{"ast_node_type":"variable","tokens":[{"end":26,"kind":"keyword","start":0,"text":"let"}]}
            let mut body =
        ty::InstanceKind::FutureDropPollShim(def_id, proxy_ty, impl_ty) => {
                async_destructor_ctor::build_future_drop_poll_shim(tcx, def_id, proxy_ty, impl_ty);