code: func (c *Client) TorrentStopHashes(hashes []string) (err error) {
  	if err = c.rpcCall("torrent-stop", &torrentActionHashesParam{IDs: hashes}, nil); err != nil {
  		err = fmt.Errorf("'torrent-stop' rpc method failed: %v", err)
  	}
  	return
  }
docs: // TorrentStopHashes stops torrent(s) which hash is in the provided slice.
  // Can be one, can be several, can be all (if slice is empty or nil).