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