PFNGLMAPBUFFERARBPROCDart typedef
        PFNGLMAPBUFFERARBPROCDart =
     Pointer<NativeType>  Function(int target, int access)
    
    
    
Implementation
typedef PFNGLMAPBUFFERARBPROCDart =
    Pointer<NativeType> Function(int target, int access);