---
title: NSToolbar.WillAddItemMessage
framework: appkit
role: symbol
role_heading: Structure
path: appkit/nstoolbar/willadditemmessage
---

# NSToolbar.WillAddItemMessage

## Declaration

```swift
struct WillAddItemMessage
```

## Topics

### Initializers

- [init(toolbar:item:newIndex:)](appkit/nstoolbar/willadditemmessage/init(toolbar:item:newindex:).md)

### Instance Properties

- [item](appkit/nstoolbar/willadditemmessage/item.md)
- [newIndex](appkit/nstoolbar/willadditemmessage/newindex.md)
- [toolbar](appkit/nstoolbar/willadditemmessage/toolbar.md)

## Relationships

### Conforms To

- [NotificationCenter.MainActorMessage](foundation/notificationcenter/mainactormessage.md)
- [SendableMetatype](swift/sendablemetatype.md)