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# NSPopUpButtonCell.WillPopUpMessage

```
struct WillPopUpMessage
```

## Topics

### Initializers

[`init(popUpButtonCell: NSPopUpButtonCell)`](/documentation/AppKit/NSPopUpButtonCell/WillPopUpMessage/init(popUpButtonCell:))

### Instance Properties

[`var popUpButtonCell: NSPopUpButtonCell`](/documentation/AppKit/NSPopUpButtonCell/WillPopUpMessage/popUpButtonCell)

## Relationships

### Conforms To

[`MainActorMessage`](/documentation/Foundation/NotificationCenter/MainActorMessage)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

---

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