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# init(id:configurations:defaultConfigurationId:)

Creates a configuration set from an ID, an array of configurations, and a default
configuration ID.

```
init(id: String, configurations: [Entity.ConfigurationCatalog.Configuration], defaultConfigurationId: String? = nil) throws
```

## Parameters

`id`

The ID of the configuration set that’s unique across all other configuration sets.

`configurations`

An array of configurations you can choose from.
The configuration set stores the array in the [`configurations`](/documentation/RealityKit/Entity/ConfigurationCatalog/ConfigurationSet/configurations)
property and doesn’t preserve the order of the array.

`defaultConfigurationId`

The ID of one of the configuration elements in the
`configurations` parameter, which is the default configuration the entity initializer
applies if you don’t choose a configuration from the set.

## Return Value

A configuration set containing the configurations.

---

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