PFNGLCOLORPOINTEREXTPROCDart typedef
        PFNGLCOLORPOINTEREXTPROCDart =
     void Function(int size, int type, int stride, int count, Pointer<NativeType>  pointer)
    
    
    
Implementation
typedef PFNGLCOLORPOINTEREXTPROCDart =
    void Function(
      int size,
      int type,
      int stride,
      int count,
      Pointer<NativeType> pointer,
    );