libatk1.0-udeb-dbgsym 2.18.0-1 (arm64 binary) in ubuntu xenial

 This is a udeb, or a microdeb, for the debian-installer.
 .
 ATK is a toolkit providing accessibility interfaces for applications or
 other toolkits. By implementing these interfaces, those other toolkits or
 applications can be used with tools such as screen readers, magnifiers, and
 other alternative input devices.
 .
 This is a stripped down version of the runtime part of ATK.