---
title: "readAttributeNullableEnum8(completionHandler:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclustertestcluster/readattributenullableenum8(completionhandler:)"
---

# readAttributeNullableEnum8(completionHandler:)

## Declaration

```swift
func readAttributeNullableEnum8(completionHandler: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)
```

```swift
func readAttributeNullableEnum8() async throws -> NSNumber
```