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




``` Hack
private function loadExistingFiles(): ?string;
```




## Returns




* ` ?string `