BackgroundAlphaChannel  238 Magick++/lib/Magick++/Include.h   using MagickCore::BackgroundAlphaChannel;
BackgroundAlphaChannel  629 magick/channel.c     case BackgroundAlphaChannel:
BackgroundAlphaChannel   97 magick/option.c     { "Background", BackgroundAlphaChannel, UndefinedOptionFlag, MagickFalse },