/**
* Display a listing of the resource.
*
* @param Request $r
* @return \Illuminate\Http\Response
*/
public function index(Request $r)
{
$withChildren = (bool) $r->get('withChildren', false);
if ($withChildren) {
$root = Node::all()->toHierarchy();
} else {
$root = Node::roots()->get();
}
return Response::json($root);
}
