/usr/lib/libglademm-2.4/proc/m4/convert_libglademm.m4 is in libglademm-2.4-dev 2.6.7-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | _CONVERSION(`GList*',`Glib::ListHandle<Gtk::Widget*>',__FL2H_SHALLOW)
_CONVERSION(`GladeXML*',`Glib::RefPtr<Xml>',`Glib::wrap($3)')
|