pathname for a directory containing modules to load.
a list of #GIOModules loaded from the directory, All the modules are loaded into memory, if you want to unload them (enabling on-demand loading) you must call g_type_module_unuse() on all the modules. Free the list with g_list_free().
Loads all the modules in the specified directory.
If don't require all modules to be initialized (and thus registering all gtypes) then you can use g_io_modules_scan_all_in_directory() which allows delayed/lazy loading of modules.