几个核心控制类库位置   'entity class' => 'Drupal\Core\Entity\Entity',  'controller class' => 'Drupal\Core\Entity\DatabaseStorageController',  'list controller class' => 'Drupal\Core\Entity\EntityListController',  'render controller class' => 'Drupal\Core\Entity\EntityRenderController',  'form controller class' => array(   'default' => 'Drupal\Core\Entity\EntityFormController', ),