code: function () {
  		var element = this.element,
  			childNodes = element.childNodes,
  			i = childNodes.length,
  			node;
  
  		while (i--) {
  			node = childNodes[i];
  			node.parentNode.removeChild(node);
  		}
  	}
docs: Remove all child nodes of a group, except the v:group element