return () -> {
            try {
                return supplier.call();
            } catch (Exception e) {
                uncheckedThrow(e);
                return null;
            }
        };
    }

    static <T extends Throwable> void uncheckedThrow(Throwable t) throws T {
        throw (T) t; // rely on vacuous cast
    }

    private void fireEvent(
            Model model,