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