PFNGLCOPYTEXIMAGE1DPROCDart typedef
        PFNGLCOPYTEXIMAGE1DPROCDart =
     void Function(int target, int level, int internalformat, int x, int y, int width, int border)
    
    
    
Implementation
typedef PFNGLCOPYTEXIMAGE1DPROCDart =
    void Function(
      int target,
      int level,
      int internalformat,
      int x,
      int y,
      int width,
      int border,
    );