---
layout: docs
title: render
id: interface.Facebook.HackCodegen.ICodeBuilderRenderer.render
docid: interface.Facebook.HackCodegen.ICodeBuilderRenderer.render
permalink: /docs/reference/interface.Facebook.HackCodegen.ICodeBuilderRenderer.render/
---
# Facebook\\HackCodegen\\ICodeBuilderRenderer::render()




``` Hack
public function render(
  ?Facebook\HackCodegen\HackBuilder $builder = NULL,
): string;
```




## Parameters




- ` ? `[` Facebook\HackCodegen\HackBuilder `](<class.Facebook.HackCodegen.HackBuilder.md>)`` $builder = NULL ``




## Returns




+ ` string `