---
title: "index(before:)"
framework: swift-package-manager
role: symbol
role_heading: Instance Method
path: "swift-package-manager/documentation/packageplugin/filelist/index(before:)"
---

# index(before:)

Inherited from RandomAccessCollection.index(before:).

## Declaration

```swift
func index(before i: Self.Index) -> Self.Index
```