Creates a #GMenuItem as an exact copy of an existing menu item in a #GMenuModel.
@item_index must be valid (ie: be sure to call g_menu_model_get_n_items() first).
a #GMenuModel
the index of an item in @model
a new #GMenuItem.
ConstructionException GTK+ fails to create the object.
2.34
See Implementation
Creates a #GMenuItem as an exact copy of an existing menu item in a #GMenuModel.
@item_index must be valid (ie: be sure to call g_menu_model_get_n_items() first).