dh_gtkmodules is a debhelper program that handles correctly generating a dependency on the versionned
Gtk+ module ABI and indexes for GdkPixbuf loaders and IM modules that it finds in the Gtk+ module
directories.
This command automatically adds a "<package>.loaders" file to the current package with the package name
or "<package>.immodules" if it finds any GdkPixbuf loaders or IM modules.
If this command finds the versionned standard module directory in the current package, it will generate a
dependency on the earliest Gtk version that Gtk currently has compatibility for in ${misc:Depends}
("binary version").