Delegate PixbufModuleSaveCallbackFunc
public delegate bool PixbufModuleSaveCallbackFunc(PixbufSaveFunc saveFunc, nint userData, nint pixbuf, nint optionKeys, nint optionValues, out nint error)
public delegate bool PixbufModuleSaveCallbackFunc(PixbufSaveFunc saveFunc, nint userData, nint pixbuf, nint optionKeys, nint optionValues, out nint error)