(*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*)valwith_timeout:?timeout_msg:string->?on_timeout:(unit->unitLwt.t)->float->(unit->('a, string)resultLwt.t)->('a, string)resultLwt.t