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