objc[339]: Class RTCCVPixelBuffer is implemented in both /System/Library/PrivateFrameworks/WebCore.framework/Frameworks/libwebrtc.dylib (0x1d1862f98) and /private/var/containers/Bundle/Application/A0EA73B4-57EF-409B-B151-7FF7A3EEEB0C/TestApp.app/Frameworks/WebRTC.framework/WebRTC (0x10176fdc0).
One of the two will be used. Which one is undefined.