# LibTmux.Id.expectedPrefix

- **Module:** LibTmux.Id
- **Package:** libtmux-haskell
- **Language:** Haskell
- **Kind:** record field
- **Source:** https://github.com/libtmux/libtmux-haskell/blob/581f0ee45016ffb2283366bb1edc1658df26c5ed/src/LibTmux/Id.hs#L64
- **Page:** https://libtmux.org/en/haskell/latest/reference/libtmux-id-v-expectedprefix/

```haskell
expectedPrefix :: !Char
```

Signature types: [`Char`](https://hackage.haskell.org/package/base-4.22.0.0/docs/Data-Char.html#t:Char).

Required entity prefix.