System/Library/Frameworks/PDFKit.framework

PDFPageLayerNoteEffect.h

NSObject
>
CALayer
>
PDFPageLayerEffect

@interface PDFPageLayerNoteEffect : PDFPageLayerEffect

- (void)update;
- (id)annotation;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })pageFrame;

@end