diff --git a/langext/maps.go b/langext/maps.go
index 6f06ed4..4a5cd11 100644
--- a/langext/maps.go
+++ b/langext/maps.go
@@ -15,3 +15,11 @@ func ArrToMap[T comparable, V any](a []V, keyfunc func(V) T) map[T]V {
 	}
 	return result
 }
+
+func CopyMap[K comparable, V any](a map[K]V) map[K]V {
+	result := make(map[K]V, len(a))
+	for k, v := range a {
+		result[k] = v
+	}
+	return result
+}