Merge remote-tracking branch 'origin/traversable-with-empty-columns-b…

…atchInsert' into traversable-with-empty-columns-batchInsert

src/QueryBuilder/AbstractDMLQueryBuilder.php

@@ -141,7 +141,7 @@ public function upsert(
      *
      * @psalm-return Iterator|array<iterable<array-key, mixed>>
      */
-    protected function prepareTraversable(Traversable $rows): Iterator|array
+    final protected function prepareTraversable(Traversable $rows): Iterator|array
     {
         while ($rows instanceof IteratorAggregate) {
             $rows = $rows->getIterator();