---
title: CollectionDifference.Indices
framework: swift
role: symbol
role_heading: Type Alias
path: swift/collectiondifference/indices
---

# CollectionDifference.Indices

A type that represents the indices that are valid for subscripting the collection, in ascending order.

## Declaration

```swift
typealias Indices = DefaultIndices<CollectionDifference<ChangeElement>>
```