---
title: "readAttributeNullableInt32u(completionHandler:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclustertestcluster/readattributenullableint32u(completionhandler:)"
---

# readAttributeNullableInt32u(completionHandler:)

## Declaration

```swift
func readAttributeNullableInt32u(completionHandler: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)
```

```swift
func readAttributeNullableInt32u() async throws -> NSNumber
```