public function removeDocuments(array $ids, $index, $type = '')
    {
        if (empty($type)) {
            $type = $this->typeName;
        }

        $client = $this->getClient();
        $index = $client->getIndex($index);

        $client->deleteIds($ids, $index, $type);

        // Refresh index because bulk deletions are slow
        $index->refresh();
    }