libmagickcore-dev 8:6.9.7.4+dfsg-16ubuntu6 (arm64 binary) in ubuntu bionic

 This package included header files and static libraries needed to compile
 programs using MagickCore.
 .
 This is a transitional package to help migrate systems to the new
 ABI of libmagickcore-6 development files for default channel depth.
 .
 This is a dummy package. You can safely purge or remove it.