# LibTmux::Session#kill

- **Module:** LibTmux::Session#
- **Package:** libtmux
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/c6d9d21771828e583692ca899ed817f9640d6a55/gems/libtmux/lib/libtmux/operations.rb#L254
- **Page:** https://libtmux.org/en/ruby/latest/reference/libtmux-session-kill/

```
LibTmux::Session#kill(expected_windows: ::Array[::LibTmux::EntityRef]? = nil, expected_panes: ::Array[::LibTmux::EntityRef]? = nil, timeout: ::Numeric = nil, cancel: untyped = nil) -> ::LibTmux::CommandResult
```

Both allowlists are required for guarded deletion of a changing topology.

Behavior contract: Entity removal.