# Session.filterFieldID(for:)

- **Module:** Session
- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-swift/blob/254f8b2be7eb60cacc3ffcb3ea8e456784f582df/Sources/LibTmux/FilterFields.swift#L17
- **Page:** https://libtmux.org/en/swift/latest/reference/session-filterfieldid(for-)/

```
Session.filterFieldID(for:)(for: PartialKeyPath<Session>) -> String?
```

The stable wire id for a key path, or `nil` if the property is not filterable.