---
title: "CompositionData"
description: "A [CompositionData] is the data tracked by the composer during composition.

This interface is not intended to be used directly and is provided to allow the tools API to have
access to data tracked during composition. The tools API should be used instead which provides a
more usable interpretation of the slot table."
type: "interface"
---

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


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

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



```kotlin
public interface CompositionData
```


A `CompositionData` is the data tracked by the composer during composition.

This interface is not intended to be used directly and is provided to allow the tools API to have
access to data tracked during composition. The tools API should be used instead which provides a
more usable interpretation of the slot table.


## Functions

```kotlin
public fun find(identityToFind: Any): CompositionGroup?
```


Find a sub-group by identity. Returns `null` if the group is not found or the implementation
of this interface does not support finding groups by their identity. In other words, a `null`
result from this method should not be interpreted as the identity is not a group in the
composition data.