PFNGLPOINTSIZEPROCDart typedef
        PFNGLPOINTSIZEPROCDart =
     void Function(double size)
    
    
    
Implementation
typedef PFNGLPOINTSIZEPROCDart = void Function(double size);typedef PFNGLPOINTSIZEPROCDart = void Function(double size);