---
title: "readAttributeOptOutState(completion:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclusterdeviceenergymanagement/readattributeoptoutstate(completion:)"
---

# readAttributeOptOutState(completion:)

## Declaration

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

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