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