---
layout: docs
title: Facebook\HackCodegen\_Private\HackBuilderKeyLambdaRenderer
id: class.Facebook.HackCodegen._Private.HackBuilderKeyLambdaRenderer
docid: class.Facebook.HackCodegen._Private.HackBuilderKeyLambdaRenderer
permalink: /docs/reference/class.Facebook.HackCodegen._Private.HackBuilderKeyLambdaRenderer/
---
# Facebook\\HackCodegen\\_Private\\HackBuilderKeyLambdaRenderer




## Interface Synopsis




``` Hack
namespace Facebook\HackCodegen\_Private;

final class HackBuilderKeyLambdaRenderer implements \IHackBuilderKeyRenderer {...}
```




### Public Methods




- [` ->__construct(\callable $callback) `](<class.Facebook.HackCodegen._Private.HackBuilderKeyLambdaRenderer.__construct.md>)
- [` ->render(\Facebook\HackCodegen\IHackCodegenConfig $config, \T $value): string `](<class.Facebook.HackCodegen._Private.HackBuilderKeyLambdaRenderer.render.md>)