namespace AVFoundation
{
    public delegate int AVAudioSourceNodeRenderHandler(bool isSilence, AudioTimeStamp timestamp, uint frameCunt, ref AudioBuffers! outputData);
    {
        public virtual IAsyncResult BeginInvoke(bool isSilence, AudioTimeStamp timestamp, uint frameCunt, ref AudioBuffers! outputData, AsyncCallback callback, object object);
    }
}