---
title: "subscript(dynamicMember:)"
framework: foundation
role: symbol
role_heading: Instance Subscript
path: "foundation/attributedstring/runs-swift.struct/run/subscript(dynamicmember:)-6royv"
---

# subscript(dynamicMember:)

## Declaration

```swift
@preconcurrency subscript<K>(dynamicMember keyPath: KeyPath<AttributeDynamicLookup, K>) -> K.Value? where K : AttributedStringKey, K.Value : Sendable { get }
```