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