AVCaptureDevice iOS 10 class methods does not found

I am facing an error which is: No known method for selector 'defaultDeviceWithDeviceType:mediaType:position:'

Documentation for this method is given at: https://developer.apple.com/reference/avfoundation/avcapturedevice/2361508-defau ltdevicewithdevicetype

My code is:

AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithDeviceType: AVCaptureDeviceTypeBuiltInDuoCamera

mediaType: AVMediaTypeVideo

position: AVCaptureDevicePositionBack];

Here are all the version details:

MacOS: 10.11.5

xCode: 8.0 beta

iOS: 10.0.1