IsImageObject    4899 coders/png.c         if (IsImageObject(previous) != MagickFalse)
IsImageObject    6419 coders/png.c           if (IsImageObject(previous) != MagickFalse)
IsImageObject     527 magick/image.h   IsImageObject(const Image *),
IsImageObject     663 magick/methods.h #define IsImageObject  PrependMagickMethod(IsImageObject)