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

# readAttributeListLongOctetString(completion:)

## Declaration

```swift
func readAttributeListLongOctetString(completion: @escaping @Sendable ([Any]?, (any Error)?) -> Void)
```

```swift
func readAttributeListLongOctetString() async throws -> [Any]
```