Warning gtk_ui_manager_new_merge_id is deprecated and should not be used in newly-written code. 3.10 Returns an unused merge id, suitable for use with gtk_ui_manager_add_ui(). Since 2.4
an unused merge id.
See Implementation
Warning gtk_ui_manager_new_merge_id is deprecated and should not be used in newly-written code. 3.10 Returns an unused merge id, suitable for use with gtk_ui_manager_add_ui(). Since 2.4