---
title: "optionalGroup(customizationIdentifier:isInDefaultCustomization:representativeItem:items:)"
framework: uikit
role: symbol
role_heading: Type Method
path: "uikit/uibarbuttonitemgroup/optionalgroup(customizationidentifier:isindefaultcustomization:representativeitem:items:)"
---

# optionalGroup(customizationIdentifier:isInDefaultCustomization:representativeItem:items:)

Creates an optional group that a person can move, add to, or remove from the navigation bar during layout customization.

## Declaration

```swift
@MainActor @preconcurrency class func optionalGroup(customizationIdentifier: String, isInDefaultCustomization: Bool = true, representativeItem: UIBarButtonItem? = nil, items: [UIBarButtonItem]) -> UIBarButtonItemGroup
```

## Parameters

- `customizationIdentifier`: A unique string to identify the group for navigation bar layout customization.
- `isInDefaultCustomization`: A Boolean that determines whether to place the group in the navigation bar by default. Specify doc://com.apple.documentation/documentation/Swift/false if you want the group to appear in the navigation bar customization popover by default.
- `representativeItem`: The item to display for the group when space is constrained.
- `items`: The items to include in the group.

## See Also

### Creating a group

- [fixedGroup(representativeItem:items:)](uikit/uibarbuttonitemgroup/fixedgroup(representativeitem:items:).md)
- [movableGroup(customizationIdentifier:representativeItem:items:)](uikit/uibarbuttonitemgroup/movablegroup(customizationidentifier:representativeitem:items:).md)
- [init(barButtonItems:representativeItem:)](uikit/uibarbuttonitemgroup/init(barbuttonitems:representativeitem:).md)
- [init(coder:)](uikit/uibarbuttonitemgroup/init(coder:).md)