---
title: "FunctionKeyMetaClass"
description: "This annotation is applied to the FunctionKeyMeta classes created by the Compose Compiler. This
is intended to be used to provide information useful to tooling."
type: "class"
---

<div class='type'>Class</div>


<a id='references'></a>

<div class='sourceset sourceset-common'>Common</div>


```kotlin
@ComposeCompilerApi
@Target(AnnotationTarget.CLASS)
public annotation class FunctionKeyMetaClass(val file: String)
```


This annotation is applied to the FunctionKeyMeta classes created by the Compose Compiler. This
is intended to be used to provide information useful to tooling.

#### Parameters

| | |
| --- | --- |
| file | The file path of the file the associated class was produced for |