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




``` Hack
public function addParameters(
  Traversable<string> $params,
): this;
```




## Parameters




* ` Traversable<string> $params `




## Returns




- ` this `