*  @return whether the pages exist
     *  @throws IOException if a network error occurs
     *  @since 0.10
     */
    public boolean[] exists(String... titles) throws IOException
    {
        boolean[] ret = new boolean[titles.length];
        HashMap[] info = getPageInfo(titles);
        for (int i = 0; i < titles.length; i++)
            ret[i] = (Boolean)info[i].get("exists");
        return ret;
    }