-@property (nonatomic, unsafe_unretained) IBOutlet NSSplitView *verticalSplitView;
-@property (nonatomic, unsafe_unretained) IBOutlet NSSplitView *horizontalSplitView;
-@property (nonatomic, unsafe_unretained) IBOutlet NSView *leftTopView;
-@property (nonatomic, unsafe_unretained) IBOutlet NSView *leftBottomView;
-@property (nonatomic, unsafe_unretained) IBOutlet NSOutlineView *outlineView;
-@property (nonatomic, unsafe_unretained) IBOutlet NSBrowser *browser;
-@property (nonatomic, unsafe_unretained) IBOutlet NSMenu *outlineViewMenu;
-@property (nonatomic, unsafe_unretained) IBOutlet NSMenu *browserMenu;
-