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