```diff
--- test_files/404-original.txt	2025-03-07 19:06:53
+++ test_files/404-modified.txt	2025-03-07 19:06:53
@@ -3,10 +3,10 @@
 import typing as t
 
 from . import base
-from ._action import Action
-from ._app import App
-from ._tag import Tag
-from ._trigger import Trigger
+from .action import Action
+from .app import App
+from .tag import Tag
+from .trigger import Trigger
 
 
 TagType = t.Union[str, Tag]
@@ -15,7 +15,7 @@
 AppType = t.Union[str, App]
 "Type placeholder for `App`"
 
-ActionType = t.Union[str, Action]
+ActionType = t.Union[str, Action, t.Type[base.SentinalObject]]
 "Type placeholder for `Action`"
 
 TriggerType = t.Union[str, Trigger]
```
