# LibTmux::FilterExpr#entity

- **Module:** LibTmux
- **Package:** libtmux
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/46474e8a2f03e39fc2b0ff73b6a841777b79c4d2/gems/libtmux/lib/libtmux/criteria.rb#L32
- **Page:** https://libtmux.org/en/ruby/v0.1.2/reference/libtmux-filterexpr-entity/

```
def entity: () -> ::Symbol
```

Returns the value of attribute entity.

Behavior contract: Criteria.