Vision iOS 14.0 Beta 2 to Beta 3 API Differences

VNObservation.h
Added VNRecognizedPointsObservation.availableKeys
Added -[VNRecognizedPointsObservation recognizedPointForKey:error:]
Declaration
From@property (readonly) NSArray<VNRecognizedPointGroupKey> *availableGroupKeys
To@property (readonly, copy) NSArray<VNRecognizedPointGroupKey> *availableGroupKeys