---
title: "readAttributeNullableBitmap32(completionHandler:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclustertestcluster/readattributenullablebitmap32(completionhandler:)"
---

# readAttributeNullableBitmap32(completionHandler:)

## Declaration

```swift
func readAttributeNullableBitmap32(completionHandler: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)
```

```swift
func readAttributeNullableBitmap32() async throws -> NSNumber
```