public function parse(Parser $parser, Stream $stream)
{
$node = $this->helper->createRenderBlockNode($parser->getCurrentBlock(), $this->helper->createContext($stream->next()->test(Token::IDENTIFIER, 'using'), $stream, $parser));
$expression = $node->getChild('expression');
if (!$expression instanceof FunctionNode) {
throw new \UnexpectedValueException("An instance of FunctionNode was expected");
}
$expression->addArgument(new DataNode(true));
return $node;
}
