subscript(_:_:_:_:)

iOS
15+
macOS
12+
tvOS
15+
watchOS
8+
@preconcurrency subscript<T, U, V, W>(t: T.Type, u: U.Type, v: V.Type, w: W.Type) -> AttributedString.Runs.AttributesSlice4<T, U, V, W> where T : AttributedStringKey, U : AttributedStringKey, V : AttributedStringKey, W : AttributedStringKey, T.Value : Sendable, U.Value : Sendable, V.Value : Sendable, W.Value : Sendable { get }