diff --git a/Utils.py b/Utils.py
index 6d4462651c89..2cb046b36014 100644
--- a/Utils.py
+++ b/Utils.py
@@ -2,6 +2,7 @@
 
 import asyncio
 import json
+import types
 import typing
 import builtins
 import os
@@ -18,7 +19,7 @@
 
 from argparse import Namespace
 from settings import Settings, get_settings
-from typing import BinaryIO, Coroutine, Optional, Set, Dict, Any, Union
+from typing import BinaryIO, Coroutine, Generator, List, Optional, Set, TypeVar, Dict, Any, Union
 from typing_extensions import TypeGuard
 from yaml import load, load_all, dump
 
@@ -775,6 +776,14 @@ def async_start(co: Coroutine[None, None, typing.Any], name: Optional[str] = Non
     task.add_done_callback(_faf_tasks.discard)
 
 
+T = TypeVar("T")
+def flatten(l: List[T] | Generator[T] | T) -> List[T]:
+    if type(l) is list or type(l) is types.GeneratorType:
+        return [ y for x in l for y in flatten(x) ]
+    else:
+        return [ l ]
+
+
 def deprecate(message: str):
     if __debug__:
         raise Exception(message)