BackgroundAlphaChannel  284 Magick++/lib/Magick++/Include.h   using MagickCore::BackgroundAlphaChannel;
BackgroundAlphaChannel  718 magick/channel.c     case BackgroundAlphaChannel:
BackgroundAlphaChannel  100 magick/option.c     { "Background", BackgroundAlphaChannel, UndefinedOptionFlag, MagickFalse },