libgtk2-perl-dbgsym 2:1.2496-1 (amd64 binary) in ubuntu xenial

 Gtk2 allows you to write graphical user interfaces in a Perlish and
 object-oriented way, freeing you from the casting and memory management in C,
 yet remaining very close in spirit to original API.
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 Gtk+ is a multi-platform toolkit for creating graphical user interfaces.
 Offering a complete set of widgets, the Gtk+ is suitable for projects ranging
 from small one-off tools to complete application suites. Find out more about
 Gtk+ at http://www.gtk.org.