The objects in the model are of type [class@Gtk.StringObject] and have a "string" property that can be used inside expressions.
`GtkStringList` is well-suited for any place where you would typically use a `char*[]`, but need a list model.
GtkStringList as GtkBuildable
The `GtkStringList` implementation of the `GtkBuildable` interface supports adding items directly using the `<items>` element and
specifying `<item>` elements for each item. Each `<item>` element supports the regular translation attributes “translatable”,
“context” and “comments”.
Here is a UI definition fragment specifying a `GtkStringList`