# Client.filterFormatField(_:)

- **Module:** Client
- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-swift/blob/254f8b2be7eb60cacc3ffcb3ea8e456784f582df/Sources/LibTmux/FilterExpr.swift#L38
- **Page:** https://libtmux.org/en/swift/latest/reference/client-filterformatfield(_-)/

```
Client.filterFormatField(_:)(id: String) -> String?
```

No field lowers unless a model says so, so a conformance written before this existed keeps working and simply filters at home.