# FilterSchema.Field.id

- **Module:** FilterSchema.Field
- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-swift/blob/f02a4668570e1cc5198c941413750e021f42c214/Sources/LibTmux/FilterSchema.swift#L29
- **Page:** https://libtmux.org/reference/swift/filterschema-field-id/

The stable id a `FilterExpr` carries.