PFNGLMAPVERTEXATTRIB2FAPPLEPROCDart typedef
        PFNGLMAPVERTEXATTRIB2FAPPLEPROCDart =
     void Function(int index, int size, double u1, double u2, int ustride, int uorder, double v1, double v2, int vstride, int vorder, Pointer<Float>  points)
    
    
    
Implementation
typedef PFNGLMAPVERTEXATTRIB2FAPPLEPROCDart =
    void Function(
      int index,
      int size,
      double u1,
      double u2,
      int ustride,
      int uorder,
      double v1,
      double v2,
      int vstride,
      int vorder,
      Pointer<Float> points,
    );