code: public function convert(Expr\ClosureUse $node)
      {
          if ($node->byRef) {
              $this->logger->logNode(
                  'Zephir not support reference parameters for now. Stay tuned for https://github.com/phalcon/zephir/issues/203',
                  $node,
                  $this->dispatcher->getMetadata()->getClass()
              );
          }
  
          return $this->reservedWordReplacer->replace($node->var);
      }
docs: @param Expr\ClosureUse $node
  
  @return string