public function getNodes()
{
$nodes = array();
$nodes[Twital::NS]['extends'] = new Node\ExtendsNode();
$nodes[Twital::NS]['block'] = new Node\BlockNode();
$nodes[Twital::NS]['macro'] = new Node\MacroNode();
$nodes[Twital::NS]['import'] = new Node\ImportNode();
$nodes[Twital::NS]['include'] = new Node\IncludeNode();
$nodes[Twital::NS]['omit'] = new Node\OmitNode();
$nodes[Twital::NS]['embed'] = new Node\EmbedNode();
$nodes[Twital::NS]['use'] = new Node\UseNode();
return $nodes;
}