readAttributeBarrierPosition(completionHandler:)
Declaration
func readAttributeBarrierPosition(completionHandler: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)func readAttributeBarrierPosition() async throws -> NSNumberfunc readAttributeBarrierPosition(completionHandler: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)func readAttributeBarrierPosition() async throws -> NSNumber