Added some class dependencies which were missing

modules/opencase_defaults/opencase_defaults.module

@@ -5,6 +5,8 @@
  * Contains opencase_defaults.module.
  */
 
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Field\BaseFieldDefinition;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\user\Entity\Role;
 use Drupal\user\RoleInterface;