/**
  * Create the supporting plugin manager.
  *
  * @param ServiceLocatorInterface $serviceLocator Service locator
  * @param array                   $rbacConfig     ZfcRbac configuration
  *
  * @return PermissionProviderPluginManager
  */
 protected function getPermissionProviderPluginManager(ServiceLocatorInterface $serviceLocator, array $rbacConfig)
 {
     $pm = new PermissionProvider\PluginManager(new Config($rbacConfig['vufind_permission_provider_manager']));
     $pm->setServiceLocator($serviceLocator->getServiceLocator());
     return $pm;
 }