libmagick++-dev 8:6.9.10.23+dfsg-2.1ubuntu11 (amd64 binary) in ubuntu focal

 The Magick++ library was a set of C++ wrapper classes that provides access
 to the ImageMagick package functionality from within a C++ application.
 .
 This is a transitional package to help migrate systems to the new
 ABI of libmagick++-6 development files for default channel depth.
 .
 This is a dummy package. You can safely purge or remove it.