---
layout: docs
title: setShebangLinef
id: class.Facebook.HackCodegen.CodegenFile.setShebangLinef
docid: class.Facebook.HackCodegen.CodegenFile.setShebangLinef
permalink: /docs/reference/class.Facebook.HackCodegen.CodegenFile.setShebangLinef/
---
# Facebook\\HackCodegen\\CodegenFile::setShebangLinef()




``` Hack
public function setShebangLinef(
  HH\Lib\Str\SprintfFormatString $format,
  mixed ...$args,
): this;
```




## Parameters




* ` HH\Lib\Str\SprintfFormatString $format `
* ` mixed ...$args `




## Returns




- ` this `