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




Add code using the %-placeholder format string and array of values, then
insert a newline




``` Hack
final protected function addLineImplvf(
  ?string $code,
  array<mixed> $args,
): this;
```




## Parameters




* ` ?string $code `
* ` array<mixed> $args `




## Returns




- ` this `