SwirlPreview      557 Magick++/lib/Magick++/Include.h   using MagickCore::SwirlPreview;
SwirlPreview     2524 magick/effect.c       case SwirlPreview:
SwirlPreview     1451 magick/option.c     { "Swirl", SwirlPreview, UndefinedOptionFlag, MagickFalse },