libgtk3.0-0-dbg 2.99.2-1ubuntu3 (amd64 binary) in ubuntu natty

 The 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.
 .
 This package contains detached debugging symbols.
 .
 Most people will not need this package.