---
title: clusterUnitTestingAttributeEpochSID
framework: matter
role: symbol
role_heading: Type Property
path: matter/mtrattributeidtype/clusterunittestingattributeepochsid
---

# clusterUnitTestingAttributeEpochSID

## Declaration

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