---
title: "readAttributeNullableInt32s(completion:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclusterunittesting/readattributenullableint32s(completion:)"
---

# readAttributeNullableInt32s(completion:)

## Declaration

```swift
func readAttributeNullableInt32s(completion: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)
```

```swift
func readAttributeNullableInt32s() async throws -> NSNumber
```