void gtk_combo_box_text_insert_text(GtkComboBoxText *combo_box, gint position, const gchar *text);
void gtk_combo_box_text_prepend_text(GtkComboBoxText *combo_box, const gchar *text);
void gtk_combo_box_text_remove(GtkComboBoxText *combo_box, gint position);
void gtk_combo_box_text_insert_text(GtkComboBoxText *combo_box, gint position, const gchar *text);
void gtk_combo_box_text_prepend_text(GtkComboBoxText *combo_box, const gchar *text);
void gtk_combo_box_text_remove(GtkComboBoxText *combo_box, gint position);