@Override
    public Integer doCall() throws Exception {
        CommandLineHelper
                .loadProperties(p -> {
                    for (String k : p.stringPropertyNames()) {
                        String v = p.getProperty(k);
                        printer().printf("%s = %s%n", k, v);
                    }
                });
        return 0;
    }
@Test
    public void shouldHandleEmptyConfig() throws Exception {
        UserConfigHelper.createUserConfig("");

        ConfigList command = new ConfigList(new CamelJBangMain().withPrinter(printer));
        command.doCall();

        Assertions.assertEquals("", printer.getOutput());
    }