+void widget_textbox_set_fixed_size(struct nc_widget_textbox *textbox);
+void widget_textbox_set_validator_integer(struct nc_widget_textbox *textbox,
+ long min, long max);
+void widget_textbox_set_validator_ip(struct nc_widget_textbox *textbox);
+void widget_textbox_set_validator_ip_multi(struct nc_widget_textbox *textbox);
+void widget_textbox_set_validator_url(struct nc_widget_textbox *textbox);
+
+void widget_subset_add_option(struct nc_widget_subset *subset, const char *text);
+void widget_subset_make_active(struct nc_widget_subset *subset, int idx);
+
+void widget_subset_on_change(struct nc_widget_subset *subset,
+ void (*on_change)(void *arg, int value), void *arg);
+