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# init(_:id:for:content:)

Creates a data-presenting window group with a localized title
string and an identifier.

```
@export(implementation) nonisolated init<D, C>(_ titleResource: LocalizedStringResource, id: String, for type: D.Type, @ContentBuilder content: @escaping (Binding<D?>) -> C) where Content == PresentedWindowContent<D, C>, D : Decodable, D : Encodable, D : Hashable, C : View
```

## Parameters

`titleResource`

The title resource to use for the group’s title.

`id`

A string that uniquely identifies the window group. Identifiers
must be unique among the window groups in your app.

`type`

The type of presented data this window group accepts.

`content`

A closure that creates the content for each instance
of the group. The closure receives a binding to the value that you
pass into the [`openWindow`](/documentation/SwiftUI/EnvironmentValues/openWindow) action when you open
the window. SwiftUI automatically persists and restores the value
of this binding as part of the state restoration process.

## Discussion

The window group uses the specified content as a
template to create each window in the group.

The system uses the title to distinguish the window group in the user
interface, such as in the name of commands associated with the group.

SwiftUI creates a window from the group when you present a value
of the specified type using the [`openWindow`](/documentation/SwiftUI/EnvironmentValues/openWindow) action.

---

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