QuantizePreview   559 Magick++/lib/Magick++/Include.h   using MagickCore::QuantizePreview;
QuantizePreview  2420 magick/effect.c       case QuantizePreview:
QuantizePreview  1440 magick/option.c     { "Quantize", QuantizePreview, UndefinedOptionFlag, MagickFalse },