getItemType
Gets the type of the items in @list.
All items returned from g_list_model_get_item() are of the type returned by this function, or a subtype, or if the type is an interface, they are an implementation of that interface.
The item type of a #GListModel can not change during the life of the model.
Return
the #GType of the items contained in @list.
Since
2.44