From 76bffdec7b13bfdb13366c5722cb269d6d78c060 Mon Sep 17 00:00:00 2001
From: Marco Gorelli <33491632+MarcoGorelli@users.noreply.github.com>
Date: Fri, 6 Sep 2024 18:45:21 +0100
Subject: [PATCH] comment

---
 narwhals/_arrow/group_by.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/narwhals/_arrow/group_by.py b/narwhals/_arrow/group_by.py
index 0767d95ac..78b241c9b 100644
--- a/narwhals/_arrow/group_by.py
+++ b/narwhals/_arrow/group_by.py
@@ -18,7 +18,7 @@
 POLARS_TO_ARROW_AGGREGATIONS = {
     "n_unique": "count_distinct",
     "std": "stddev",
-    "var": "variance",
+    "var": "variance",  # currently unused, we don't have `var` yet
 }