+gchar * value_to_text (union value v, const PsppireDict *dict, struct fmt_spec format);
+
+
+union value *
+text_to_value (const gchar *text,
+ const PsppireDict *dict,
+ const struct variable *var,
+ union value *);
+
+GObject *get_object_assert (GtkBuilder *builder, const gchar *name, GType type);
+GtkAction * get_action_assert (GtkBuilder *builder, const gchar *name);
+GtkWidget * get_widget_assert (GtkBuilder *builder, const gchar *name);