Alternative to gtk_widget_insert_action_group in Gtk 3.4

[Lanoxx <lanoxx gmx net>]

Hello everyone,

in my program I recently migrated away from GtkUiBuilder to GtkBuilder 
and from GtkActionGroup to GActions and family. Now I have a GtkMenu 
which is called as a context menu and build from a GMenuModel. I am 
using ActionMaps and an ActionGroup to add several GActions and connect 
them to the menu. Then I add accelerator path's to connect some 
reconfigurable hotkeys. This all works.

However to connect the action group to the GtkMenu I use: 
gtk_widget_insert_action_group and I just noticed that this is only 
available in Gtk3.6. As everything else in my app is compatible with 
Gtk3.4 I would hate to loose compatibility with 3.4. My question is, if 
there is an alternative to this function that I can use with Gtk3.4? In 
other words, how can I add a GActionGroup to a GtkMenu in Gtk 3.4?

I do not use GtkApplication btw.

Cheers
Sebastian