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




``` Hack
public function getFileName(): string;
```




## Returns




- ` string `