libgail-3-dev 3.24.20-0ubuntu1.1 (s390x binary) in ubuntu focal

 Gail implements ATK interfaces for GTK widgets which are dynamically
 loadable at runtime by a GTK application. Once loaded, those parts of
 an application that use standard GTK widgets will have a basic level
 of accessibility, without the need to modify the application at all.
 .
 This package contains the development files for Gail.