PFNGLVERTEXATTRIBFORMATNVPROCDart typedef
        PFNGLVERTEXATTRIBFORMATNVPROCDart =
     void Function(int index, int size, int type, int normalized, int stride)
    
    
    
Implementation
typedef PFNGLVERTEXATTRIBFORMATNVPROCDart =
    void Function(int index, int size, int type, int normalized, int stride);