DESCR("maximum number of lb. iterations", "%s",
h.val_or_string(lb_maxiter, "infinity"));
DESCR("exit on close", "%s", h.on_off(exit_on_close));
DESCR("maximum number of lb. iterations", "%s",
h.val_or_string(lb_maxiter, "infinity"));
DESCR("exit on close", "%s", h.on_off(exit_on_close));