Add code to support item identifier to NSTableView

Headers/AppKit/NSTableView.h

@@ -33,6 +33,7 @@
 #import <AppKit/NSControl.h>
 #import <AppKit/NSDragging.h>
 #import <AppKit/NSUserInterfaceValidation.h>
+#import <AppKit/NSUserInterfaceItemIdentification.h>
 
 @class NSArray;
 @class NSIndexSet;
@@ -190,6 +191,7 @@ APPKIT_EXPORT_CLASS
   /* Supporting ivars for view based tables */
   BOOL _viewBased;
   NSMapTable *_renderedViewPaths;
+  NSMutableDictionary *_registeredViews;
 }
 
 /* Data Source */
@@ -396,6 +398,7 @@ APPKIT_EXPORT_CLASS
 - (void) insertRowsAtIndexes: (NSIndexSet*)indexes withAnimation: (NSTableViewAnimationOptions)animationOptions;
 - (void) removeRowsAtIndexes: (NSIndexSet*)indexes withAnimation: (NSTableViewAnimationOptions)animationOptions;
 - (NSInteger) rowForView: (NSView*)view;
+- (NSView *) makeViewWithIdentifier: (NSUserInterfaceItemIdentifier)identifier owner:(id)owner;
 #endif
 
 @end /* interface of NSTableView */

Headers/AppKit/NSUserInterfaceItemIdentification.h

@@ -30,7 +30,7 @@
 
 #import <Foundation/NSObject.h>
 
-#if OS_API_VERSION(MAC_OS_X_VERSION_10_7, GS_API_LATEST)
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_13, GS_API_LATEST)
 
 #if	defined(__cplusplus)
 extern "C" {

Source/NSTableColumn.m

@@ -579,7 +579,7 @@ to YES. */
       if ([aDecoder containsValueForKey: @"NSPrototypeCellViews"])
 	{
 	  ASSIGN(_prototypeCellViews, [aDecoder decodeObjectForKey: @"NSPrototypeCellViews"]);
-	}      
+	}
     }
   else
     {

Source/NSTableView.m

@@ -6889,6 +6889,11 @@ For a more detailed explanation, -setSortDescriptors:. */
   return NSNotFound;
 }
 
+- (NSView *) makeViewWithIdentifier: (NSUserInterfaceItemIdentifier)identifier owner:(id)owner
+{
+  return nil;
+}
+
 @end /* implementation of NSTableView */
 
 @implementation NSTableView (SelectionHelper)