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