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# AVExperienceController.TransitionGroup

A group of experience transitions that prepare concurrently and
run simultaneously as a single visual transition.

```
struct TransitionGroup<ChildTransitionResult> where ChildTransitionResult : Sendable
```

## Overview

Use [`withTransitionGroup(body:)`](/documentation/AVKit/AVExperienceController/withTransitionGroup(body:)) to create a transition group.
Add transitions using [`addTransition(operation:)`](/documentation/AVKit/AVExperienceController/TransitionGroup/addTransition(operation:)), and they perform together once all
have been added and prepared.

Transitions in a group prepare concurrently, then perform their animations simultaneously,
creating a single cohesive visual transition. Each transition completes with its own result,
allowing you to handle individual successes and failures.

## Handle Failures

Individual transitions may fail during preparation or execution without affecting other
transitions in the group.

## Topics

### Adding transitions

[`func addTransition(operation: sending () async -> ChildTransitionResult)`](/documentation/AVKit/AVExperienceController/TransitionGroup/addTransition(operation:))

Adds a transition to the group, suspending it until all transitions are ready to run together.


---

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