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