UndefinedPreview  533 Magick++/lib/Magick++/Include.h   using MagickCore::UndefinedPreview;
UndefinedPreview 1424 magick/option.c     { "Undefined", UndefinedPreview, UndefinedOptionFlag, MagickTrue },
UndefinedPreview 1454 magick/option.c     { (char *) NULL, UndefinedPreview, UndefinedOptionFlag, MagickFalse }
UndefinedPreview 2335 wand/mogrify.c               preview_type=UndefinedPreview;
UndefinedPreview 7050 wand/mogrify.c                 image_info->preview_type=UndefinedPreview;