AVFoundation iOS 12.2 Beta 2 to Beta 3 API Differences

AVCaptureSession.h
Modified AVCaptureConnection.output
Declaration
From@property (nonatomic, readonly, nonnull) AVCaptureOutput *output
To@property (nonatomic, readonly, nullable) AVCaptureOutput *output

Modified AVCaptureConnection.videoPreviewLayer
Declaration
From@property (nonatomic, readonly, nonnull) AVCaptureVideoPreviewLayer *videoPreviewLayer
To@property (nonatomic, readonly, nullable) AVCaptureVideoPreviewLayer *videoPreviewLayer