diff --git a/vendor/google.golang.org/protobuf/proto/merge.go b/vendor/google.golang.org/protobuf/proto/merge.go
index 3c6fe57..ef55b97 100644
--- a/vendor/google.golang.org/protobuf/proto/merge.go
+++ b/vendor/google.golang.org/protobuf/proto/merge.go
@@ -59,6 +59,12 @@
 	return dst.Interface()
 }
 
+// CloneOf returns a deep copy of m. If the top-level message is invalid,
+// it returns an invalid message as well.
+func CloneOf[M Message](m M) M {
+	return Clone(m).(M)
+}
+
 // mergeOptions provides a namespace for merge functions, and can be
 // exported in the future if we add user-visible merge options.
 type mergeOptions struct{}