code: function renderDOM($, dom, options) {
      if (!dom && $._root && $._root.children) {
          dom = $._root.children;
      }
      options = options|| dom.options || $._options;
      return domSerializer(dom, options);
  }
docs: Render a cheerio DOM as html
  
  @param {HTMLDom} $
  @param {HTMLElement} dom
  @param {Object}
  @return {String}