cheerio 怎么取得outerHTML ?

 var cheerio = require("cheerio");


var html=" <div > <div id='content' class='msg' >xxxx </div> </div>";

 var $ = cheerio.load(html,{decodeEntities: false});

console.log($('#content').html());

这样能取出xxxx 我要连 div id='content' 全部都取出来怎么写?