code: public function getCatSession(RouteItem $routeItem = null)
      {
          return $this->getServiceManager()->get(CatService::SERVICE_ID)->getCatSession(
              $this->getTestSession(),
              $this->getCompilationDirectory()['private'],
              $routeItem
          );
      }
docs: Get the current CAT Session Object.
  
  @param RouteItem|null $routeItem
  @return \oat\libCat\CatSession|false