MainWindowController.h

/*
 Copyright (C) 2015 Apple Inc. All Rights Reserved.
  See LICENSE.txt for this sample’s licensing information
  
  Abstract:
  This class provides the delegate/datasource for the NSOutlineView and NSPredicateEditor. 
   In addition, it maintains all the controller logic for the user interface. 
 */
 
#import <Cocoa/Cocoa.h>
 
@interface MainWindowController : NSObject
 
@end