PFNGLCOMPRESSEDTEXTUREIMAGE3DEXTPROCDart typedef
        PFNGLCOMPRESSEDTEXTUREIMAGE3DEXTPROCDart =
     void Function(int texture, int target, int level, int internalformat, int width, int height, int depth, int border, int imageSize, Pointer<NativeType>  bits)
    
    
    
Implementation
typedef PFNGLCOMPRESSEDTEXTUREIMAGE3DEXTPROCDart =
    void Function(
      int texture,
      int target,
      int level,
      int internalformat,
      int width,
      int height,
      int depth,
      int border,
      int imageSize,
      Pointer<NativeType> bits,
    );