{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"args.as_coroutine().kind_ty().to_opt_closure_kind().unwrap()"}]}
                                    args.as_coroutine().kind_ty().to_opt_closure_kind().unwrap()
                                && let ty::ClosureKind::FnOnce =
                                && self.caller_body.source.def_id()