---
title: clusterUnitTestingAttributeNullableBooleanID
framework: matter
role: symbol
role_heading: Type Property
path: matter/mtrattributeidtype/clusterunittestingattributenullablebooleanid
---

# clusterUnitTestingAttributeNullableBooleanID

## Declaration

```swift
static var clusterUnitTestingAttributeNullableBooleanID: MTRAttributeIDType { get }
```