# libtmux::ServerCapabilities::refuses

- **Module:** libtmux::ServerCapabilities
- **Package:** libtmux-cxx
- **Language:** C++
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-cxx/blob/393d4b0ad666f18a6581f1eb281741a75a7503f0/include/libtmux/capabilities.hpp#L144
- **Page:** https://libtmux.org/en/cxx/latest/reference/libtmux-servercapabilities-refuses/

```
libtmux::ServerCapabilities::refuses(feature: ServerFeature) -> bool
```

Whether this implementation is known to get the feature wrong, which is the opposite question from `supports` rather than its negation.

Both answer no for a backend nobody recognises: a caller asking what it may rely on must not be promised anything, and a custom executor running real tmux must not be refused for being unfamiliar.