SubtractCompositeOp  440 Magick++/lib/Magick++/Include.h   using MagickCore::SubtractCompositeOp;
SubtractCompositeOp  250 coders/xcf.c       case GIMP_SUBTRACT_MODE:     return(SubtractCompositeOp);
SubtractCompositeOp  860 magick/option.c     { "Subtract", SubtractCompositeOp, DeprecateOptionFlag, MagickTrue },