/**
  * There's some built in services that we're going to load first. 
  *
  * @return an array of services created
  */
 private function loadDefaultServices()
 {
     $services = new ArrayObject();
     $dbService = new DbService();
     if (isset($this->config['services']['DbService'])) {
         $dbService->configure($this->config['services']['DbService']);
     }
     $this->injector->registerService($dbService);
     $services[] = $dbService;
     $service = new TypeManager();
     if (isset($this->config['services']['TypeManager'])) {
         $service->configure(ifset($this->config['services'], 'TypeManager', array()));
     }
     $this->injector->registerService($service);
     $services[] = $service;
     $service = new SearchService();
     if (isset($this->config['services']['SearchService'])) {
         $service->configure($this->config['services']['SearchService']);
     }
     $this->injector->registerService($service);
     $services[] = $service;
     $authService = new AuthService();
     if (isset($this->config['services']['AuthService'])) {
         $authService->configure($this->config['services']['AuthService']);
     }
     $this->injector->registerService($authService);
     $services[] = $authService;
     $authComponent = new AuthComponent();
     if (isset($this->config['services']['AuthComponent'])) {
         $authComponent->configure($this->config['services']['AuthComponent']);
     }
     $this->injector->registerService($authComponent);
     $services[] = $authComponent;
     $tasksService = new ScheduledTasksService();
     $this->injector->registerService($tasksService);
     $services[] = $tasksService;
     $accessService = new AccessService();
     $this->injector->registerService($accessService);
     $services[] = $accessService;
     $cacheService = new CacheService();
     $this->injector->registerService($cacheService);
     $services[] = $cacheService;
     if (isset($this->config['services']['CacheService'])) {
         $cacheService->configure($this->config['services']['CacheService']);
     }
     $service = new VersioningService();
     $this->injector->registerService($service);
     $services[] = $service;
     if (isset($this->config['services']['VersioningService'])) {
         $service->configure($this->config['services']['VersioningService']);
     }
     return $services;
 }