From e415a7fad8c962ff950d9416600e16d028baa2ca Mon Sep 17 00:00:00 2001
From: jack1142 <6032823+jack1142@users.noreply.github.com>
Date: Fri, 13 Aug 2021 19:30:48 +0200
Subject: [PATCH] Make `ChainMap`'s `new_child()` and `parents` return subclass
 (#5922)

---
 stdlib/collections/__init__.pyi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/stdlib/collections/__init__.pyi b/stdlib/collections/__init__.pyi
index 0176ea461..c23c58e24 100644
--- a/stdlib/collections/__init__.pyi
+++ b/stdlib/collections/__init__.pyi
@@ -286,9 +286,9 @@ class defaultdict(Dict[_KT, _VT], Generic[_KT, _VT]):
 class ChainMap(MutableMapping[_KT, _VT], Generic[_KT, _VT]):
     maps: list[Mapping[_KT, _VT]]
     def __init__(self, *maps: Mapping[_KT, _VT]) -> None: ...
-    def new_child(self, m: Mapping[_KT, _VT] | None = ...) -> ChainMap[_KT, _VT]: ...
+    def new_child(self: Self, m: Mapping[_KT, _VT] | None = ...) -> Self: ...
     @property
-    def parents(self) -> ChainMap[_KT, _VT]: ...
+    def parents(self: Self) -> Self: ...
     def __setitem__(self, k: _KT, v: _VT) -> None: ...
     def __delitem__(self, v: _KT) -> None: ...
     def __getitem__(self, k: _KT) -> _VT: ...