GLDEBUGPROCDart typedef
        GLDEBUGPROCDart =
     void Function(int source, int type, int id, int severity, int length, Pointer<Utf8>  message, Pointer<NativeType>  userParam)
    
    
    
Implementation
typedef GLDEBUGPROCDart =
    void Function(
      int source,
      int type,
      int id,
      int severity,
      int length,
      Pointer<Utf8> message,
      Pointer<NativeType> userParam,
    );