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

# testNullableOptionalRequest(completionHandler:)

## Declaration

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

```swift
func testNullableOptionalRequest() async throws -> MTRTestClusterClusterTestNullableOptionalResponseParams
```