diff --git a/docs/example-widget-grouping-filter-childrows.html b/docs/example-widget-grouping-filter-childrows.html
index 955561bc..4b98feb2 100644
--- a/docs/example-widget-grouping-filter-childrows.html
+++ b/docs/example-widget-grouping-filter-childrows.html
@@ -33,7 +33,9 @@
background: #bfbfbf;
}
-/* Grouping widget css */
+/* Grouping widget css;
+ * contained in widget.grouping.css (added v2.28.4)
+ */
tr.group-header td {
background: #eee;
}
@@ -76,9 +78,7 @@ tr.group-header.collapsed td i {
-
-