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# updateWindowsRunLoopOrdering

Run-loop message priority for handling window updates.

```
class var updateWindowsRunLoopOrdering: Int { get }
```

## Discussion

This constant is used by the <doc://com.apple.documentation/documentation/Foundation/RunLoop> method <doc://com.apple.documentation/documentation/Foundation/RunLoop/perform(_:target:argument:order:modes:)>.

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