public function move($from, $to)
    {
        $call = 'fileops/move';
        $params = array(
                'root' => $this->root,
                'from_path' => $this->normalisePath($from),
                'to_path' => $this->normalisePath($to),
        );
        $response = $this->fetch('POST', self::API_URL, $call, $params);
        return $response;
    }