code: function(content) {
          if (content) {
              if (content._node) { // map to DOMNode
                  content = content._node;
              } else if (content._nodes) { // convert DOMNodeList to documentFragment
                  content = Y_DOM._nl2frag(content._nodes);
              }
  
          }
  
          Y_DOM.addHTML(this._node, content, 'replace');
          return this;
      }
docs: Replaces the node's current content with the content.
  @method setContent
  @param {String | Y.Node | HTMLElement} content The content to insert
  @chainable