Pfnglgettransformfeedbacki64VprocDart typedef
        Pfnglgettransformfeedbacki64VprocDart =
     void Function(int xfb, int pname, int index, Pointer<Int64>  param)
    
    
    
Implementation
typedef Pfnglgettransformfeedbacki64VprocDart =
    void Function(int xfb, int pname, int index, Pointer<Int64> param);