UISplitViewController.automaticSupplementaryFillDimension removed in Xcode 12.0 beta 5

I used the iOS 14 API UISplitViewController.automaticSupplementaryFillDimension to extend the supplementary column to the far edge of the split view controller, covering the secondary column. This API introduced in Xcode 12.0 beta 1 has been removed in Xcode 12.0 beta 5 (12A8189h).

Anyone knows how to now extend the supplementary column to the far edge of the split view to cover the secondary column?

The documentation for preferredSupplementaryColumnWidthFraction in Xcode 12.0 beta 5 (12A8189h) still mentions the removed API:

Code Block text
To extend the supplementary column to the far edge of the split view controller, covering the secondary column, set this property to automaticSupplementaryFillDimension.

Same here, any idea?
Still removed in beta 6.
UISplitViewController.automaticSupplementaryFillDimension removed in Xcode 12.0 beta 5
 
 
Q