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




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




## Parameters




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




## Returns




* ` this `