# LibTmux.FSharp.Mirror.start

- **Module:** LibTmux.FSharp
- **Package:** LibTmux.FSharp
- **Language:** F#
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-dotnet/blob/cf34b255c896d19a97e7d7fabea58609c916012d/src/LibTmux.FSharp/Control.fsi#L128
- **Page:** https://libtmux.org/en/fsharp/latest/reference/libtmux-fsharp-mirror-start/

```
val start: cancellationToken: CancellationToken -> anchor: LibTmux.Session -> Task<ServerMirror>
```

Mirrors the server an anchor session belongs to, capturing on each announcement.

The caller owns and asynchronously disposes the returned mirror.

## Parameters

- `cancellationToken` (`CancellationToken`)
- `anchor` (`LibTmux.Session`)

## Raises

- [`LibTmux.IncompleteSnapshotException`](/en/csharp/latest/reference/libtmux-incompletesnapshotexception/): The session was not read through a server.