---
title: "ArgumentMatcher.PartiallyGenerated.keyOnly(argumentName:)"
framework: Evaluations
role: symbol
role_heading: Case
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+, visionOS 27.0+, watchOS 27.0+, xcode 27.0+]
path: "evaluations/argumentmatcher/partiallygenerated/keyonly(argumentname:)"
---

# ArgumentMatcher.PartiallyGenerated.keyOnly(argumentName:)

A partially generated key-only argument matcher.

## Declaration

```swift
case keyOnly(argumentName: String.PartiallyGenerated?)
```