---
title: "MutationPhase.MutatingPendingCatchUp"
description: "Indicates active gesture mutation while waiting for the catch-up animation to start."
type: "class"
---
## API Reference

> Source set: Common

```kotlin
MutatingPendingCatchUp
```

Indicates active gesture mutation while waiting for the catch-up animation to start.

This state is transient and typically lasts for only a single frame at the beginning of a new
deferred phase that interrupts a running transition.