# LibTmux::Cancellation#reader

- **Module:** LibTmux
- **Package:** libtmux
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/46474e8a2f03e39fc2b0ff73b6a841777b79c4d2/gems/libtmux/lib/libtmux/process.rb#L44
- **Page:** https://libtmux.org/en/ruby/v0.1.2/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/v0.1.2/topics/errors-and-exceptions/)