const gchar *gl_barcode_backends_backend_id_to_name (const gchar *backend_id);
const gchar *gl_barcode_backends_backend_name_to_id (const gchar *backend_name);
+gboolean gl_barcode_backends_is_backend_id_valid (const gchar *backend_id);
const gchar *gl_barcode_backends_guess_backend_id (const gchar *id);
GList *gl_barcode_backends_get_styles_list (const gchar *backend_id);