# LibTmux::OutcomeUnknown#expected

- **Module:** LibTmux
- **Package:** libtmux
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/dcc9f8b5a6970144a9e7d80cd5f381d8f6198372/gems/libtmux/lib/libtmux/errors.rb#L5
- **Public owner:** LibTmux::Error#expected
- **Page:** https://libtmux.org/en/ruby/v0.1.0.alpha.2/reference/libtmux-outcomeunknown-expected/

```
def expected: () -> ::String?
```

Returns the value of attribute expected.

Behavior contract: Errors.