# Libtmux_eio.Operation.await_stage

- **Module:** Libtmux_eio
- **Package:** libtmux-eio
- **Language:** OCaml
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-ocaml/blob/205dfda49742592b479247049d186956e4a4cfe9/eio/libtmux_eio.mli#L86
- **Public owner:** Libtmux_eio
- **Page:** https://libtmux.org/en/ocaml/latest/reference/libtmux_eio-operation-await_stage/

```
val await_stage :
  'a t -> [ `Acknowledged | `Written ] -> ('a state, Libtmux.Error.t) result
```

Wait for the named stage or a terminal state. Acknowledgement does not establish completion. Cancelling this observer leaves the operation alone.

## Parameters

- `arg1` (`'a t`)
- `arg2` (``[ `Acknowledged | `Written ]``)