Should we give an example of this, since you don't want it documented?

```js
// Attaches the `HTML` content of the root.
// This method can be overriden to optimize rendering,
// or to render in a non standard way.
//
//   _attachHTML: function(html) {
//     this.el.innerHTML = html;
//     return this;
//   }
```

I feel like there should be a performance optimizations doc where this could be put.