public function injectObjectManager(ObjectManagerInterface $objectManager)
    {
        $this->objectManager = $objectManager;
        /** @var CacheManager $cacheManager */
        $cacheManager = $this->objectManager->get(CacheManager::class);
        $this->methodPermissionCache = $cacheManager->getCache('Flow_Security_Authorization_Privilege_Method');
        $this->runtimeExpressionEvaluator = $this->objectManager->get(RuntimeExpressionEvaluator::class);
    }