System/Library/PrivateFrameworks/PaperBoardUI.framework
PBUIGradientView.h
@class PBUIWallpaperGradient;
@interface PBUIGradientView : UIView
@property (retain, nonatomic) PBUIWallpaperGradient *gradient;
+ (Class)layerClass;
- (void).cxx_destruct;
@end