---
title: "testSimpleOptionalArgumentRequest(completionHandler:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclustertestcluster/testsimpleoptionalargumentrequest(completionhandler:)"
---

# testSimpleOptionalArgumentRequest(completionHandler:)

## Declaration

```swift
func testSimpleOptionalArgumentRequest(completionHandler: @escaping @Sendable ((any Error)?) -> Void)
```

```swift
func testSimpleOptionalArgumentRequest() async throws
```