# LibTmux::Cancellation#reader

- **Module:** LibTmux::Cancellation#
- **Package:** libtmux
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/c6d9d21771828e583692ca899ed817f9640d6a55/gems/libtmux/lib/libtmux/process.rb#L44
- **Page:** https://libtmux.org/en/ruby/latest/reference/libtmux-cancellation-reader/

```
LibTmux::Cancellation#reader() -> ::IO
```

Returns the value of attribute reader.

Behavior contract: Cancellation tokens.