public ClassifiedHttpControllerSelector(HttpConfiguration configuration)
     : base(configuration)
 {
     //check instance count, todo
     _configuration            = configuration;
     _apiControllerTypes       = new Lazy <ConcurrentDictionary <string, Type> >(GetAllControllerTypes);
     _namespaceApiSelectorLazy = new Lazy <IClassifiedHttpControllerSelectorService>(() => WebApiSelectorHelper.Resolve());
 }