Reads the page setup from the group group_name in the key file key_file.
Returns a new gtk.page_setup.PageSetup object with the restored page setup, or null if an error occurred.
the glib.key_file.KeyFile to retrieve the page_setup from
the name of the group in the key_file to read to use the default name “Page Setup”
the restored gtk.page_setup.PageSetup
Reads the page setup from the group group_name in the key file key_file.
Returns a new gtk.page_setup.PageSetup object with the restored page setup, or null if an error occurred.