public function revisions($file, $limit = 10)
    {
        $call = 'revisions/' . $this->root . '/' . $this->encodePath($file);
        $params = array(
            'rev_limit' => ($limit < 1) ? 1 : (($limit > 1000) ? 1000 : (int) $limit),
        );
        $response = $this->fetch('GET', self::API_URL, $call, $params);
        return $response;
    }