---
title: "readAttributeNullableBitmap16(completion:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclusterunittesting/readattributenullablebitmap16(completion:)"
---

# readAttributeNullableBitmap16(completion:)

## Declaration

```swift
func readAttributeNullableBitmap16(completion: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)
```

```swift
func readAttributeNullableBitmap16() async throws -> NSNumber
```