# LibTmux::Cancellation#reader

- **Module:** LibTmux
- **Package:** libtmux
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/da7b6191b9439e3c84fa1c9eeaa9168263ee7af4/gems/libtmux/lib/libtmux/process.rb#L44
- **Page:** https://libtmux.org/en/ruby/v0.1.1/reference/libtmux-cancellation-reader/

```
def reader: () -> ::IO
```

Returns the value of attribute reader.

Behavior contract: Cancellation tokens.

## Guides

Pages that discuss `reader`.

- [Ownership and errors](/en/ruby/v0.1.1/topics/errors-and-exceptions/)