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




``` Hack
public function render(
  Facebook\HackCodegen\IHackCodegenConfig $config,
  T $input,
): string;
```




## Parameters




+ [` Facebook\HackCodegen\IHackCodegenConfig `](<interface.Facebook.HackCodegen.IHackCodegenConfig.md>)`` $config ``
+ ` T $input `




## Returns




* ` string `