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# register(engine:)

Adds the group to the engine’s dictionary.

```
func register(engine: PHASEEngine)
```

## Parameters

`engine`

The engine with which to register this group.

## Discussion

The function generates an exception if the argument is `nil` or if engine already contains the group. For more information, see [`groups`](/documentation/PHASE/PHASEEngine/groups).

---

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