PDFKit iOS 11.1 to 11.2 API Differences

PDFAnnotationUtilities.h
Added PDFAnnotation.interiorColor
Added PDFAnnotation.stampName
PDFOutline.h
Modified -[PDFOutline childAtIndex:]
Declaration
From- (nonnull PDFOutline *)childAtIndex:(NSUInteger)index
To- (nullable PDFOutline *)childAtIndex:(NSUInteger)index

PDFPage.h
Modified PDFPage.dataRepresentation
Declaration
From@property (nonatomic, readonly, nonnull) NSData *dataRepresentation
To@property (nonatomic, readonly, nullable) NSData *dataRepresentation