subscript(_:_:_:)

iOS
15+
macOS
12+
tvOS
15+
watchOS
8+
@preconcurrency subscript<T, U, V>(t: KeyPath<AttributeDynamicLookup, T>, u: KeyPath<AttributeDynamicLookup, U>, v: KeyPath<AttributeDynamicLookup, V>) -> AttributedString.Runs.AttributesSlice3<T, U, V> where T : AttributedStringKey, U : AttributedStringKey, V : AttributedStringKey, T.Value : Sendable, U.Value : Sendable, V.Value : Sendable { get }