[UIKit] Update to Xcode 26.1 beta 2.

src/uikit.cs

@@ -30482,10 +30482,14 @@ interface UIDocumentBrowserAction {
 		[Export ("supportsMultipleItems")]
 		bool SupportsMultipleItems { get; set; }
 
+#if !XAMCORE_5_0
 		[NullAllowed]
 		[NoTV, iOS (26, 0), MacCatalyst (26, 0)]
+		[Obsoleted (PlatformName.iOS, 26, 1, "This API has been removed.")]
+		[Obsoleted (PlatformName.MacCatalyst, 26, 1, "This API has been removed.")]
 		[Export ("imageOnlyForContextMenu", ArgumentSemantic.Strong)]
 		UIImage ImageOnlyForContextMenu { get; set; }
+#endif
 	}
 
 	interface IUIFocusItemContainer { }
@@ -37319,6 +37323,11 @@ interface UITabGroup {
 
 		[Export ("initWithTitle:image:identifier:children:viewControllerProvider:")]
 		NativeHandle Constructor (string title, [NullAllowed] UIImage image, string identifier, UITab [] children, [NullAllowed] Func<UITab, UIViewController> viewControllerProvider);
+
+		// Header says available in iOS 26.0+, but let's use the actual version when it was released instead.
+		[NoTV, iOS (26, 1), MacCatalyst (26, 1)]
+		[Export ("isSidebarDestination")]
+		bool IsSidebarDestination { get; set; }
 	}
 
 	[NoTV, iOS (18, 0), MacCatalyst (18, 0)]
@@ -38401,4 +38410,14 @@ interface UICornerRadius : NSCopying {
 		[Export ("containerConcentricRadiusWithMinimum:")]
 		UICornerRadius CreateContainerConcentric (nfloat minimum);
 	}
+
+	// Header says available in iOS 11+, but I don't believe that
+	[iOS (26, 1), TV (26, 1), MacCatalyst (26, 1)]
+	[BaseType (typeof (UIVisualEffect))]
+	[DisableDefaultCtor]
+	interface UIColorEffect {
+		[Static]
+		[Export ("effectWithColor:")]
+		UIColorEffect Create ([NullAllowed] UIColor color);
+	}
 }

tests/cecil-tests/Documentation.KnownFailures.txt

@@ -17055,6 +17055,7 @@ M:UIKit.UICollisionBehavior.remove_BeganContact(System.EventHandler{UIKit.UIColl
 M:UIKit.UICollisionBehavior.remove_EndedBoundaryContact(System.EventHandler{UIKit.UICollisionEndedBoundaryContactEventArgs})
 M:UIKit.UICollisionBehavior.remove_EndedContact(System.EventHandler{UIKit.UICollisionEndedContactEventArgs})
 M:UIKit.UIColor.LoadDataAsync(System.String,Foundation.NSProgress@)
+M:UIKit.UIColorEffect.Create(UIKit.UIColor)
 M:UIKit.UIColorPickerViewController.Dispose(System.Boolean)
 M:UIKit.UIColorPickerViewControllerDelegate_Extensions.DidFinish(UIKit.IUIColorPickerViewControllerDelegate,UIKit.UIColorPickerViewController)
 M:UIKit.UIColorPickerViewControllerDelegate_Extensions.DidSelectColor(UIKit.IUIColorPickerViewControllerDelegate,UIKit.UIColorPickerViewController,UIKit.UIColor,System.Boolean)
@@ -24252,6 +24253,7 @@ P:UIKit.UITabBarSelectionEventArgs.ViewController
 P:UIKit.UITabBarTabSelectionEventArgs.PreviousTab
 P:UIKit.UITabBarTabSelectionEventArgs.Tab
 P:UIKit.UITabBarTabVisibilityChangeEventArgs.Tabs
+P:UIKit.UITabGroup.IsSidebarDestination
 P:UIKit.UITableView.PrefetchingEnabled
 P:UIKit.UITableViewCell.UITableViewCellAppearance.FocusStyle
 P:UIKit.UITableViewCell.UITableViewCellAppearance.SeparatorInset
@@ -28506,6 +28508,7 @@ T:UIKit.UICollectionViewDiffableDataSourceSupplementaryViewProvider
 T:UIKit.UICollectionViewFlowLayoutSectionInsetReference
 T:UIKit.UICollectionViewSelfSizingInvalidation
 T:UIKit.UICollectionViewSupplementaryRegistrationConfigurationHandler
+T:UIKit.UIColorEffect
 T:UIKit.UIColorProminence
 T:UIKit.UIConfigurationColorTransformer
 T:UIKit.UIConfigurationColorTransformerHandler