From 059cccfb3aefe98493763b4d43fac255ab5edcdf Mon Sep 17 00:00:00 2001
From: Bob Halley <halley@dnspython.org>
Date: Fri, 5 Dec 2025 15:57:20 -0800
Subject: [PATCH] conform to abstract set class type for __contains__

---
 dns/btree.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dns/btree.py b/dns/btree.py
index 12da9f56..eac80550 100644
--- a/dns/btree.py
+++ b/dns/btree.py
@@ -839,8 +839,8 @@ class BTreeSet(BTree, Generic[KT], MutableSet[KT]):
         super().__init__(t=t, original=original)
         self.in_order = in_order
 
-    def __contains__(self, key: Any) -> bool:
-        return self.get_element(key) is not None
+    def __contains__(self, x: object) -> bool:
+        return self.get_element(x) is not None
 
     def add(self, value: KT) -> None:
         elt = Member(value)
-- 
2.47.3