This example shows a Navigation list with options Yes and No:

public ListNavigationOption provide() {
    ListNavigationOption navOptList = new ArrayList<NavigationOption>();

    NavigationOption yesNavOpt = new NavigationOption();
    yesNavOpt.setId("yesOpt");
    yesNavOpt.setHotkey('Y');
    yesNavOpt.setDefaultOption(true);
    yesNavOpt.setDisplayLabel(new Label("Yes"));
    yesNavOpt.addCommand(new Command(CommandType.GOTO_STEP,"YesStepId"));
    navOptList.add(yesNavOpt);

    NavigationOption noNavOpt = new NavigationOption();
    noNavOpt.setId("noOpt");
    noNavOpt.setHotkey('N');
    noNavOpt.setDefaultOption(true);
    noNavOpt.setDisplayLabel(new Label("No"));
    noNavOpt.addCommand(new Command(CommandType.GOTO_STEP,"NoStepId"));
    navOptList.add(noNavOpt);

    return navOptList;
}