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