---
title: "testComplexNullableOptionalRequest(with:completionHandler:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclustertestcluster/testcomplexnullableoptionalrequest(with:completionhandler:)"
---

# testComplexNullableOptionalRequest(with:completionHandler:)

## Declaration

```swift
func testComplexNullableOptionalRequest(with params: MTRTestClusterClusterTestComplexNullableOptionalRequestParams, completionHandler: @escaping @Sendable (MTRTestClusterClusterTestComplexNullableOptionalResponseParams?, (any Error)?) -> Void)
```

```swift
func testComplexNullableOptionalRequest(with params: MTRTestClusterClusterTestComplexNullableOptionalRequestParams) async throws -> MTRTestClusterClusterTestComplexNullableOptionalResponseParams
```