subscript(_:_:)

iOS
15+
macOS
12+
tvOS
15+
watchOS
8+
@preconcurrency subscript<T, U>(t: KeyPath<AttributeDynamicLookup, T>, u: KeyPath<AttributeDynamicLookup, U>) -> AttributedString.Runs.AttributesSlice2<T, U> where T : AttributedStringKey, U : AttributedStringKey, T.Value : Sendable, U.Value : Sendable { get }