xxlimited: yes, even you get updated for py310 (#5301)

stdlib/xxlimited.pyi

@@ -1,13 +1,18 @@
+import sys
 from typing import Any
 
-class Null: ...
 class Str: ...
 
 class Xxo:
     def demo(self) -> None: ...
 
-class error: ...
-
 def foo(__i: int, __j: int) -> Any: ...
 def new() -> Xxo: ...
-def roj(__b: Any) -> None: ...
+
+if sys.version_info >= (3, 10):
+    class Error: ...
+
+else:
+    class error: ...
+    class Null: ...
+    def roj(__b: Any) -> None: ...