public function loadBuilder(fs\file $file, fs\directory $dir = null, core\argument $args = null, dom\document $doc = null)
{
if (!$dir) {
$dir = $file->getParent();
}
if (!$doc) {
$doc = $file->asDocument();
}
$result = $this->loadBuilderFromNS($doc->getRoot()->getNamespace(), $file, $dir, $args, $doc);
return $result;
}