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