SdlAudioStreamCallbackDart typedef
        SdlAudioStreamCallbackDart =
     void Function(Pointer<NativeType>  userdata, Pointer<SdlAudioStream>  stream, int additionalAmount, int totalAmount)
    
    
    
Implementation
typedef SdlAudioStreamCallbackDart =
    void Function(
      Pointer<NativeType> userdata,
      Pointer<SdlAudioStream> stream,
      int additionalAmount,
      int totalAmount,
    );