UndefinedRule     564 Magick++/lib/Magick++/Include.h   using MagickCore::UndefinedRule;
UndefinedRule    1063 magick/option.c     { "Undefined", UndefinedRule, UndefinedOptionFlag, MagickTrue },
UndefinedRule    1066 magick/option.c     { (char *) NULL, UndefinedRule, UndefinedOptionFlag, MagickFalse }
UndefinedRule    1121 magick/option.c     { (char *) NULL, UndefinedRule, UndefinedOptionFlag, MagickFalse }